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Journal articles on the topic 'Southern Vlax'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Irizarri, Pablo. "Chilští Romové ze skupiny Chorachane: Etnografické poznámky lingvisty." Romano džaniben 28, no. 2 (2021): 31–55. https://doi.org/10.5281/zenodo.10404994.

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Chilská romská komunita patří převážně ke skupině, která si říká <em>Chorachaj</em> nebo <em>Chorachane Roma</em>. Svůj původ umisťují do Srbska a Bosny na počátku 20. století a hovoří jihovla&scaron;ským dialektem rom&scaron;tiny. Tato studie představuje různé aspekty jejich životního stylu, historie, identity, interetnických vztahů a percepcí, náboženských a manželských zvyklostí a jazyka. Vychází z nedávného te

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Sukumar, S., and R. J. Allen. "Linearly Polarised Radio Emission from M83 (NGC 5236) and NGC 891." Symposium - International Astronomical Union 140 (1990): 215–18. http://dx.doi.org/10.1017/s0074180900190023.

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Recent VLA 20 cm radio continuum observations of the southern face-on barred spiral M83 reveal that the magnetic field is very highly aligned at the outer regions (~12 kpc radius) and totally disrupted in the inner regions (<6 kpc) of the galaxy. The RM variation suggests an axisymmetric morphology for the magnetic field. VLA 6 cm continuum polarization observations of the edge-on spiral NGC 891 reveal ordered magnetic fields at large Z-distances (~3 kpc) from the galactic plane, probably emanating from the disk through instabilities.

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3

Lang, Cornelia C., and Mark Morris. "8.5. Radio polarimetric study of the Galactic center threads." Symposium - International Astronomical Union 184 (1998): 353–54. http://dx.doi.org/10.1017/s0074180900085181.

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The Very Large Array (VLA) has been used to carry out a high resolution, polarimetric study of the isolated non-thermal radio filaments, G0.08+0.15, and G359.96+0.09, also known as the Northern and Southern Threads, found near the Galactic Center (GC).

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Fletcher, A., B. Burke, S. Conner, et al. "Preliminary VLA Snapshots of Southern Radio Sources from the Parkes-MIT-NRAO (PMN) Survey." Symposium - International Astronomical Union 173 (1996): 401–2. http://dx.doi.org/10.1017/s0074180900231896.

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Reid, R. I., P. P. Kronberg, and R. A. Perley. "VLA Images at 5 GHz of 212 Southern Extragalactic Objects." Astrophysical Journal Supplement Series 124, no. 2 (1999): 285–381. http://dx.doi.org/10.1086/313259.

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6

Zhang, ZH, S. Vekemans, MS Aly, M. Jaspers, P. Marynen, and JJ Cassiman. "The gene for the alpha 4 subunit of the VLA-4 integrin maps to chromosome 2Q31-32." Blood 78, no. 9 (1991): 2396–99. http://dx.doi.org/10.1182/blood.v78.9.2396.2396.

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Abstract The VLA-4 integrin (CD49d/CD29), initially discovered on lymphoid cells, is actually known to be highly expressed on T cells, B cells, monocytes, and derived cell lines. Unlike other VLA integrins, mainly involved in cell-matrix adhesive interactions, VLA-4 has also been implicated in several cellular interactions. Based on the published alpha 4 cDNA sequence, a 1,142-bp alpha 4 cDNA fragment was amplified using the polymerase chain reaction. This fragment was used to isolate three overlapping genomic clones from a phage library. By Southern analysis with the cDNA probe, and using the

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Zhang, ZH, S. Vekemans, MS Aly, M. Jaspers, P. Marynen, and JJ Cassiman. "The gene for the alpha 4 subunit of the VLA-4 integrin maps to chromosome 2Q31-32." Blood 78, no. 9 (1991): 2396–99. http://dx.doi.org/10.1182/blood.v78.9.2396.bloodjournal7892396.

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The VLA-4 integrin (CD49d/CD29), initially discovered on lymphoid cells, is actually known to be highly expressed on T cells, B cells, monocytes, and derived cell lines. Unlike other VLA integrins, mainly involved in cell-matrix adhesive interactions, VLA-4 has also been implicated in several cellular interactions. Based on the published alpha 4 cDNA sequence, a 1,142-bp alpha 4 cDNA fragment was amplified using the polymerase chain reaction. This fragment was used to isolate three overlapping genomic clones from a phage library. By Southern analysis with the cDNA probe, and using the polymera

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8

Burns, Jack O., and David A. Clarke. "The Polarization Structure of Centaurus A." Symposium - International Astronomical Union 140 (1990): 469–71. http://dx.doi.org/10.1017/s0074180900190898.

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New VLA observations have revealed sharp gradients in both the depolarization and rotation measure in the lobes of Cen A. We attribute these jumps to a foreground screen in the southern lobe, and to the passage of the jet through a shock in a Malin shell in the northern lobe.

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9

Harnett, J. I., R. F. Haynes, R. Wielebinski, and U. Klein. "Radio Polarization Observations of Three Southern Galaxies." Publications of the Astronomical Society of Australia 8, no. 3 (1990): 257–60. http://dx.doi.org/10.1017/s1323358000023468.

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AbstractObservations of polarized emission and consequently the investigation of magnetic fields in northern galaxies, have been conducted successfully for some time with, for example, the 100-m Effelsberg telescope of the Max-Planck-Institut-für Radioastronomie and the VLA. However, the opportunity to make corresponding studies in the southern hemisphere has only recently become possible. Therefore, we have begun a long-range project aimed at studying the morphology and dynamics of southern galaxies using the facilities of the Parkes and Molonglo radio telescopes, the Siding Spring optical fa

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de Vegt, Chr, N. Zacharias, K. J. Johnston, and R. Hindsley. "Improving the Reference Frame by Radio–and Optical Astrometry of Radio Stars." International Astronomical Union Colloquium 127 (1991): 246–49. http://dx.doi.org/10.1017/s0252921100063880.

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AbstractA longterm program of precise radio – and optical astrometry of selected radio stars has been conducted in the last decade by our observatories using the VLA and astrographs on both hemispheres. Positions of 54 stars north of −26 deg. declination including 6 MASER stars have been obtained. The program status and some results from the southern hemisphere are reported.

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Cappa, Cristina, W. Miller Goss, Virpi S. Niemela, and Pablo G. Ostrov. "NGC 2359: VLA H I and radio continuum observations." Symposium - International Astronomical Union 193 (1999): 340–41. http://dx.doi.org/10.1017/s0074180900205639.

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NGC 2359, a H II region located at a distance of 5 kpc from the Sun (e.g., Goudis et al. 1994), appears as a ring like nebula surrounding HD 56925, a Wolf-Rayet star of type WN4. The nebula consists of a filamentary shell, a southern bar and streamers of diffuse gas (cf. Schneps et al. 1981, SHWB). Here we report the results of H I 21-cm line and radio continuum observations in the direction of NGC 2359.

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12

Bean, Ben, Sanjay Bhatnagar, Sandra Castro, et al. "CASA, Common Astronomy Software Applications for Radio Astronomy." Publications of the Astronomical Society of the Pacific 134, no. 1041 (2022): 114501. http://dx.doi.org/10.1088/1538-3873/ac9642.

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Abstract CASA, the Common Astronomy Software Applications, is the primary data processing software for the Atacama Large Millimeter/submillimeter Array (ALMA) and the Karl G. Jansky Very Large Array (VLA), and is frequently used also for other radio telescopes. The CASA software can handle data from single-dish, aperture-synthesis, and Very Long Baseline Interferometery (VLBI) telescopes. One of its core functionalities is to support the calibration and imaging pipelines for ALMA, VLA, VLA Sky Survey, and the Nobeyama 45 m telescope. This paper presents a high-level overview of the basic struc

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Andernach, H., O. B. Slee, A. L. Roy, and M. Ehle. "Extreme Relic Radio Sources in Four Southern Clusters." Symposium - International Astronomical Union 199 (2002): 153–56. http://dx.doi.org/10.1017/s0074180900168767.

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We describe the highest-resolution radio observations yet made of relic radio sources. These relics have extremely steep (α ≤ −2.5) spectra and are located in four southern Abell clusters (A 13, A 85, A133, A 4038). VLA images at 1.4 GHz and ∼4″ resolution show a remarkable variety of fine structure like arcs, wisps, plumes, and loops. Integrated polarization fractions range from 2.3% to 16.8%. Deep red CCD images do not reveal any optical object with a brightness and/or position typical of a radio host galaxy. The X-ray centroids in ROSAT images tend to be displaced from the cluster potential

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Steffen, W., A. J. Holloway, A. Pedlar, and D. J. Axon. "IRAS 0421+0400: A Curious Spiral with Flaring Jets." Symposium - International Astronomical Union 175 (1996): 179–80. http://dx.doi.org/10.1017/s0074180900080451.

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We present new VLA observations of IRAS 0421+0400 at 1.4 and 5 GHz, providing dual frequency information and higher resolution than previously available. We find extremely accurate alignment of the central double with the closest (though not brightest) feature in the southern kiloparsec hotspot region. There is a tight relation between the symmetric radio structure and emission line gas in the hotspot regions of this Seyfert 2 type galaxy.

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Sadler, Elaine M., Richard W. Hunstead, Thomas Mauch, et al. "Mapping the Local and Distant Universe with SUMSS." Symposium - International Astronomical Union 216 (2005): 211–18. http://dx.doi.org/10.1017/s0074180900196652.

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The Sydney University Molonglo Sky Survey (SUMSS) is a radio continuum imaging survey of the southern sky at 843 MHz, with similar sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). We have combined radio data from SUMSS and NVSS with optical spectra from the 2dF Galaxy Redshift Survey and 6dF Galaxy Survey to study the space distribution and properties of both AGN and star-forming galaxies in the local universe (redshift range 0 < z < 0.3). We also discuss new results on radio-source clustering in the more distant universe (z ∼ 1) and present the first results from a

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Bohrer-Adornes, Rosane, and Everton Lüdke. "VLA and ATCA observations of the nuclear activity in selected southern Seyfert galaxies." Proceedings of the International Astronomical Union 2004, IAUS222 (2004): 309–10. http://dx.doi.org/10.1017/s1743921304002352.

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Wrobel, J. M., R. C. Walker, and A. H. Bridle. "The relativistic Jet in M84." Symposium - International Astronomical Union 175 (1996): 131–32. http://dx.doi.org/10.1017/s0074180900080311.

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The elliptical galaxy M84 (NGC 4374, UGC 07494) hosts an FR-I radio continuum source (Laing & Bridle 1987, MNRAS, 228, 557) and a dusty, warped optical emission line “disk” (Baumet al.1988, ApJS, 68, 643; Goudfrooijet al.1994, A&ApS, 105, 341). HST imaging shows that the inner dust distribution is not relaxed, but filamentary and complex (Jaffeet al.1994, AJ, 108, 1567). M84 is a member of the Virgo Cluster, at which distance 1 arcsec = 73 pc independent of Hubble's constant (Jacobyet al.1990, ApJ, 356, 332). Our VLA imaging, at 6 cm with a resolution of 500 mas (36 pc) FWHM, shows tha

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Ali, Arshi, Biny Sebastian, Darshan Kakkad, et al. "Jet-mode Feedback in NGC 5972: Insights from Resolved MUSE, GMRT, and VLA Observations." Astrophysical Journal 984, no. 2 (2025): 110. https://doi.org/10.3847/1538-4357/adc38d.

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Abstract NGC 5972, a Voorwerp galaxy, features a helical-shaped extended emission-line region (EELR) with a radius >10 kpc and an S-shaped radio structure spanning about 470 kpc. We use the Very Large Telescope, Multi Unit Spectroscopic Explorer, Giant Metrewave Radio Telescope, and Very Large Array (VLA) to study the stellar and ionized gas kinematics and how the radio jet influences the gas in the galaxy. Our sensitive radio observations detect the southern jet for the first time, roughly coinciding with the southern EELR. The VLA images show a continuous inner jet connected to the outer

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M. Sadler, Elaine, and R. W. Hunstead. "The Sydney University Molonglo Sky Survey (SUMSS) and Optical Redshift Surveys of the Southern Sky." Symposium - International Astronomical Union 199 (2002): 11–20. http://dx.doi.org/10.1017/s0074180900168470.

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The Sydney University Molonglo Sky Survey (SUMSS) is a radio imaging survey at 843 MHz of the whole sky south of declination −30°. With a resolution of 43″ × 43″ cosec |δ| and an rms noise level of ∼ 1 mJy/beam, SUMSS has similar sensitivity and resolution to the northern NRAO VLA Sky Survey (NVSS). Here, we present some results from the first two years of SUMSS and also show what can be done by combining radio data from SUMSS and NVSS with the new generation of large optical redshift surveys (including the 2dF Galaxy Redshift Survey and 6dF Galaxy Survey) now becoming available in the souther

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Mutie, Isaac M., David Williams-Baldwin, Robert J. Beswick, et al. "Radio jets in NGC 1068 with e-MERLIN and VLA: structure and morphology." Monthly Notices of the Royal Astronomical Society 527, no. 4 (2023): 11756–65. http://dx.doi.org/10.1093/mnras/stad3864.

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ABSTRACT We present new high-sensitivity e-MERLIN and Very Large Array (VLA) radio images of the prototypical Seyfert 2 galaxy NGC 1068 at 5, 10, and 21 GHz. We image the radio jet, from the compact components north-east (NE), C, S1, and S2 to the faint double-lobed jet structure of the NE and south-west (SW) jet lobes. We map the jet between 15 kλ and 3300 kλ spatial scales by combining enhanced-Multi Element Radio Linked Interferometer Network (e-MERLIN) and VLA data for the first time. Components NE, C, and S2 have steep spectra indicative of optically thin non-thermal emission domination b

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Morganti, R., T. Oosterloo, C. N. Tadhunter, R. Aiudi, P. Jones, and M. Villar-Martin. "The radio structures of southern 2-Jy radio sources: New ATCA and VLA radio images." Astronomy and Astrophysics Supplement Series 140, no. 3 (1999): 355–72. http://dx.doi.org/10.1051/aas:1999427.

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Chan, B. H. P., and L. E. Cram. "Image Processing for the Sydney University Molonglo Sky Survey (SUMSS)." Publications of the Astronomical Society of Australia 19, no. 2 (2002): 201–6. http://dx.doi.org/10.1071/as01060.

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AbstractThe Sydney University Molonglo Sky Survey (SUMSS) is a deep radio survey at 843 MHz, covering the region south of −30° declination. Designed to be a southern counterpart of the northern NRAO VLA Sky Survey (NVSS), SUMSS is over 40% complete, and it is now time to devise ways to generate the source catalogue for the survey. We describe here new methods to deal with image artifacts to minimise spurious fits by automatic source fitting algorithms. With the new techniques, an automatically generated, objective catalogue can be made to a 10 mJy cutoff. Catalogues can be made to a 5 mJy cuto

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Taylor, Gregory B. "The parsec-scale nucleus and jets of Hydra A." Symposium - International Astronomical Union 175 (1996): 133–35. http://dx.doi.org/10.1017/s0074180900080323.

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Sensitive, high-resolution VLBA observations of the nuclear region of Hydra A are presented at 1.3, 5 and 15 GHz. Hydra A (3C218) is an outstanding example of a high-luminosity FRI radio galaxy embedded within a cooling flow cluster. VLA observations by Taylor & Perley (1993) have demonstrated extremely high (>5000 radians m–2) Faraday rotation measures (RMs) and a striking RM and depolarization asymmetry between the northern and southern radio lobes. In view of this asymmetry on the kpc-scale Hydra A appears remarkably symmetric on the pc-scale in the radio continuum. Hydra A is also u

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Rivers, A. J., P. A. Henning, and R. C. Kraan-Korteweg. "Galaxies Detected by the Dwingeloo Obscured Galaxies Survey." Publications of the Astronomical Society of Australia 16, no. 1 (1999): 48–52. http://dx.doi.org/10.1071/as99048.

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AbstractThe Dwingeloo Obscured Galaxies Survey (DOGS) is a 21-cm blind survey for galaxies hidden in the northern ‘Zone of Avoidance’ (ZOA): the portion of the optical extragalactic sky which is obscured by dust in the Milky Way. Like the Parkes southern hemisphere ZOA survey, the DOGS project is designed to reveal hidden dynamically important nearby galaxies and to help ‘fill in the blanks’ in the local large scale structure. To date, 36 galaxies have been detected by the Dwingeloo survey; 23 of these were previously unknown [no corresponding sources recorded in the NASA Extragalactic Databas

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Duvidovich, L., A. Petriella, and E. Giacani. "Radio study of the extended TeV source VER J1907+062." Monthly Notices of the Royal Astronomical Society 491, no. 4 (2019): 5732–39. http://dx.doi.org/10.1093/mnras/stz3414.

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ABSTRACT This paper aims to provide new insights on the origin of the TeV source VER J1907+062 through new high-quality radio observations. We used the Karl G. Jansky Very Large Array (VLA) to observe the whole extension of VER J1907+062 at 1.5 GHz with a mosaicking technique and the PSR J1907+0602 in a single pointing at 6 GHz. These data were used together with 12CO and atomic hydrogen observations obtained from public surveys to investigate the interstellar medium in the direction of VER J1907+062. The new radio observations do not show any evidence of a pulsar wind nebula (PWN) driven by t

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Sheehan, Patrick D., John J. Tobin, Zhi-Yun Li, et al. "A VLA View of the Flared, Asymmetric Disk around the Class 0 Protostar L1527 IRS." Astrophysical Journal 934, no. 2 (2022): 95. http://dx.doi.org/10.3847/1538-4357/ac7a3b.

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Abstract We present high-resolution Karl G. Jansky Very Large Array (VLA) observations of the protostar L1527 IRS at 7 mm, 1.3 cm, and 2 cm wavelengths. We detect the edge-on dust disk at all three wavelengths and find that it is asymmetric, with the southern side of the disk brighter than the northern side. We confirm this asymmetry through analytic modeling and also find that the disk is flared at 7 mm. We test the data against models including gap features in the intensity profile, and though we cannot rule such models out, they do not provide a statistically significant improvement in the

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Lonsdale, Colin J., and Peter D. Barthel. "The Working Surface of a Powerful Radio Source: Global MkIII Observations of the Southern Lobe of 3C205." Symposium - International Astronomical Union 129 (1988): 135–36. http://dx.doi.org/10.1017/s007418090013428x.

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The radio source 3C205 is identified with a quasar of redshift 1.53, and is, at first glance, a standard, powerful double radio source with hotspots. Upon closer examination (MERLIN, VLA A-array), the southern lobe is seen to consist of two distinct hotspots plus some more diffuse emission, some 50 kiloparsecs from the quasar (Ho ∼ 75). The arcsecond-scale morphology and polarization structure of this hotspot complex strongly suggests that the larger and weaker off-axis secondary hotspot has been formed by outflow of material from the more compact primary hotspot (Lonsdale and Barthel 1984,6).

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Watson, Sarah K., Richard J. Davis, and Peredur M. Williams. "MERLIN observations of WR 147 (WN8(h)+B0.5V)." Symposium - International Astronomical Union 193 (1999): 396–97. http://dx.doi.org/10.1017/s0074180900205913.

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WR147 was first discovered to be a strong radio, X-ray and infra-red emission source by Caillault et al. (1985). It was classified as a WN8 type star with a very large mass loss rate and unusual radio emission (α < 0) for a thermal source. This unusual behaviour was explained by MERLIN (Moran et al. 1989) and VLA (Churchwell et al. 1992) observations in which it was resolved into two components: a ‘thermal’ source associated with the Wolf-Rayet star and a non-thermal component ∼ 600 mas to the north. Churchwell et al. showed that the southern component had the expected spectral index of α ≃

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Paré, Dylan M., Cornelia C. Lang, and Mark R. Morris. "A VLA Study of Newly Discovered Southern Latitude Nonthermal Filaments in the Galactic Center: Polarimetric and Magnetic Field Properties." Astrophysical Journal 974, no. 2 (2024): 200. http://dx.doi.org/10.3847/1538-4357/ad74fe.

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Abstract A population of structures unique to the Galactic Center (GC), known as the nonthermal filaments (NTFs), has been studied for over 40 yr, but much remains unknown about them. In particular, there is no widely accepted and unified understanding for how the relativistic electrons illuminating these structures are generated. One possibility is that there are compact and extended sources of cosmic rays, which then diffuse along magnetic flux tubes leading to the illumination of the NTFs through synchrotron emission. In this work, we present and discuss the polarimetric distributions assoc

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Morris, M. R., J. H. Zhao, and W. M. Goss. "Nonthermal filamentary radio features within 20 pc of the Galactic center." Proceedings of the International Astronomical Union 9, S303 (2013): 369–73. http://dx.doi.org/10.1017/s1743921314000933.

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AbstractDeep imaging of the Sgr A complex at 6 cm wavelength with the B and C configurations of the Karl G. Jansky VLA† has revealed a new population of faint radio filaments. Like their brighter counterparts that have been observed throughout the Galactic center on larger scales, these filaments can extend up to ∼10 parsecs, and in most cases are strikingly uniform in brightness and curvature. Comparison with a survey of Paschen-α emission reveals that some of the filaments are emitting thermally, but most of these structures are nonthermal: local magnetic flux tubes illuminated by synchrotro

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Arnaboldi, Magda. "New HI Observations of the prototype Polar Ring Galaxy NGC 4650A." Publications of the Astronomical Society of Australia 14, no. 1 (1997): 92–95. http://dx.doi.org/10.1071/as97092.

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AbstractNew, high-resolution observations of the HI emission line and 20 cm continuum at the Australia Telescope Compact Array (ATCA) for the prototype polar ring galaxy NGC 4650A are presented. They show the presence of a far more extended HI distribution than previously observed with the VLA, and a very regular velocity field out to a distance of ∼50 kpc. The combined analysis of the HI data with optical and near-infrared (NIR) images argues against previous warp models used to describe the dynamics of this object. Further analysis of the new B-band image obtained at the European Southern Ob

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Hunter, Todd R., and Crystal L. Brogan. "EVLA imaging of the water masers in the massive protostellar cluster NGC6334I." Proceedings of the International Astronomical Union 8, S287 (2012): 502–3. http://dx.doi.org/10.1017/s1743921312007600.

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AbstractWe have used the recently-upgraded Karl G. Jansky Very Large Array (VLA) in A-configuration to observe the water masers in the massive protostellar cluster NGC6334I with broad bandwidth and high spectral resolution. Four groups of maser spots are found. The two groups with the broadest velocity span (40 km/s) are towards the UCHII region and the hot core SMA1. The spatial kinematics of the SMA1 masers are consistent in sense and orientation with the large-scale CO outflow and appear to trace the base of the outflow from a protostar at the dust peak of SMA1. Additional masers at the sou

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Yusef-Zadeh, F., Mark Morris, A. N. Lasenby, J. H. Seiradakis, and R. Wielebinski. "Magnetic Filaments in the Negative-Latitude Extension of the Radio Arc Near the Galactic Center." Symposium - International Astronomical Union 140 (1990): 373–74. http://dx.doi.org/10.1017/s0074180900190539.

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Continuum observations of the southern extension of the radio Arc located near 1~0.2° have been carried out at λ20 and 6cm using the VLA in its hybrid B/C and C/D array configurations. A number of long and narrow filaments have been identified on the negative latitude side of the plane. Some of the filaments appear to extend continuously into the radio continuum Arc and suggesting strongly that they are associated physically with the Arc. Other filaments appear isolated and thus have characteristics similar to those of the radio “threads” which have been seen near the Galactic center. These ne

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Chyży, Krzysztof T., and Rainer Beck. "Magnetic Fields in Strongly Interacting Galaxy Systems." Symposium - International Astronomical Union 217 (2004): 436–38. http://dx.doi.org/10.1017/s0074180900198158.

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We obtained VLA radio total power and polarization maps of a merging pair of galaxies NGC4038/39. The whole system is filled with bright extended radio emission with a high thermal fraction of ⋍ 50% at 10.45 GHz and very strong magnetic fields of ⋍ 20μG. A star-forming region at the southern end of the dark cloud complex extending between the galaxies has highly tangled magnetic fields reaching the strength of ⋍ 30μG, even larger than in both individual galaxies. The polarized components associated with the HI ridge at the base of one of the tidal tails and with the northern complex of dark cl

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Sjouwerman, Loránt O., Ylva M. Pihlström, R. Michael Rich, Mark R. Morris, and Mark J. Claussen. "Thousands of Stellar SiO masers in the Galactic center: The Bulge Asymmetries and Dynamic Evolution (BAaDE) survey." Proceedings of the International Astronomical Union 11, S322 (2016): 103–6. http://dx.doi.org/10.1017/s1743921316012394.

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AbstractA radio survey of red giant SiO sources in the inner Galaxy and bulge is not hindered by extinction. Accurate stellar velocities (<1 km/s) are obtained with minimal observing time (<1 min) per source. Detecting over 20,000 SiO maser sources yields data comparable to optical surveys with the additional strength of a much more thorough coverage of the highly obscured inner Galaxy. Modeling of such a large sample would reveal dynamical structures and minority populations; the velocity structure can be compared to kinematic structures seen in molecular gas, complex orbit structure in

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Querejeta, M., E. Schinnerer, A. Schruba, et al. "Dense gas is not enough: environmental variations in the star formation efficiency of dense molecular gas at 100 pc scales in M 51." Astronomy & Astrophysics 625 (May 2019): A19. http://dx.doi.org/10.1051/0004-6361/201834915.

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It remains unclear what sets the efficiency with which molecular gas transforms into stars. Here we present a new VLA map of the spiral galaxy M 51 in 33 GHz radio continuum, an extinction-free tracer of star formation, at 3″ scales (∼100 pc). We combined this map with interferometric PdBI/NOEMA observations of CO(1–0) and HCN(1–0) at matched resolution for three regions in M 51 (central molecular ring, northern and southern spiral arm segments). While our measurements roughly fall on the well-known correlation between total infrared and HCN luminosity, bridging the gap between Galactic and ex

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Sjouwerman, Lorant O., Ylva M. Pihlström, Adam C. Trapp, et al. "A Masing BAaDE’s Window." Proceedings of the International Astronomical Union 14, S343 (2018): 334–37. http://dx.doi.org/10.1017/s1743921318005719.

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AbstractWe report on the Bulge Asymmetries and Dynamic Evolution (BAaDE) survey which has observed 19 000 MSX color selected red giant stars for SiO maser emission at 43 GHz with the VLA and is in the process of observing 9 000 of these stars with ALMA at 86 GHz in the Southern sky. Our setup covers the main maser transitions, as well as those of isotopologues and selected lines of carbon-bearing species. Observations of this set of lines allow a far-reaching catalog of line-of-sight velocities in the dust-obscured regions where optical surveys cannot reach. Our preliminary detection rate is c

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Huebner, Anna. "Who came first – Dracula or the Tourist? New Perspectives on Dracula Tourism at Bran Castle." European Journal of Tourism Research 4, no. 1 (2011): 55–65. http://dx.doi.org/10.54055/ejtr.v4i1.62.

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The emergence of the Dracula figure within popular culture has caused strong associations to vampire myths with the Romanian region of Transylvania. Bran Castle, set on the southern borders to Walachia has somewhat become a centre for ‘Dracula Tourism’, being connected not only to the fictional Dracula, but increasingly also to the historical legend of the ‘Dracul’ Vlad. In her study, Banyai (2010) examined post visitors’ images held of the Castle and the compliance of these images with tour guides on-site interpretations, identifying an imbalance between the images held and interpretations pr

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Bardelli, S., E. Zucca, G. Zamorani, G. Vettolani, and R. Scaramella. "Multiwavelength Study of the Shapley Concentration." Symposium - International Astronomical Union 179 (1998): 342–43. http://dx.doi.org/10.1017/s0074180900128967.

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The Shapley Concentration is a prominent supercluster in the southern sky. It is interesting not only for its relevance in the peculiar motion problem (it seems to be responsible of ∼ 30% of the acceleration acting on the Local Group of galaxies), but also because it is the most remarkable feature which appears studying the distribution of the Abell-ACO clusters of galaxies: Zucca et al. (1993) found that at every density contrast the Shapley Concentration stands out as the richest supercluster in the sky. In particular, the central part of this supercluster is dominated by a complex containin

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Pavlova, Borislava K., Sevginar F. Ibryamova, Dаrina Bachvarova, et al. "SPECIFIC MICROBIOLOGY SPECTRUM OF WHITE SAND MUSSELS FROM KEY SAMPLE SPOTS FROM BULGARIAN BLACK SEA AQUATORY." Journal of IMAB - Annual Proceeding (Scientific Papers) 27, no. 4 (2021): 4077–83. http://dx.doi.org/10.5272/jimab.2021274.4077.

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The "white sand mussels" are edible bivalves inhabiting the littoral shores usually buried in the sand. Тhey are invasive species for the Bulgarian waters of the Black Sea. The samples for this study were collected from different points on the northern and southern Black Sea Bulgarian coast in the period January 2020 to December 2020. The study of different types of microorganisms was performed by using the microbial identification system model: MicroLog M® BIO45101 BiologInc and the software product GEN III. The physic-chemical parameters of the waters – temperature, pH, salinity and dissolve

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S., M. Kholod, V. Kuzmyshyna N., M. Kirian V., and V. Tryhub O. "Characteristics of introduced varieties of pea (Pisum sativum L.) in the zone of the Southern Forest-Steppe of Ukraine." Plant varieties studying and protection 18, no. 1 (2022): 24–33. https://doi.org/10.21498/2518-1017.18.1.2022.257584.

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<strong>Aim</strong>. To assess new introduced varieties of pea (Pisum sativum L.) of different ecological and geographical origin in conditions of the Southern part of the Forest-Steppe of Ukraine according to a set of productivity and adaptability indicators. <strong>Methods</strong>. During 2018–2020 in the conditions of Ustymivka Experimental Station of Plant Production of the Plant Production Institute named after V. Ya. Yuriev NAAS of Ukraine (Poltava region, 49°18′21″N, 33°13′56″E) 30 new pea samples originating from Belarus, Azerbaijan, Canada, Pol

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Nagashima, Yuzuki, Toshiki Saito, Soh Ikarashi, et al. "Measuring 60 pc-scale Star Formation Rate of the Nearby Seyfert Galaxy NGC 1068 with ALMA, HST, VLT/MUSE, and VLA." Astrophysical Journal 974, no. 2 (2024): 243. http://dx.doi.org/10.3847/1538-4357/ad6312.

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Abstract The star formation rate (SFR) is a fundamental parameter for describing galaxies and inferring their evolutionary course. H ii regions yield the best measure of instantaneous SFR in galaxies, although the derived SFR can have large uncertainties depending on tracers and assumptions. We present an SFR calibration for the entire molecular gas disk of the nearby Seyfert galaxy NGC 1068, based on our new high-sensitivity Atacama Large Millimeter/submillimeter Array 100 GHz continuum data at 55 pc (= 0.″8) resolution in combination with the Hubble Space Telescope Paα line data. In this cal

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Xu, Jianghui, Yang Yang, Jiang-Tao Li, et al. "CHANG-ES. XXXV. Cosmic Ray Transport and Magnetic Field Structure of NGC 3556 at 3 GHz." Astrophysical Journal 978, no. 1 (2024): 5. https://doi.org/10.3847/1538-4357/ad946e.

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Abstract Radio halos of edge-on galaxies are crucial for investigating cosmic ray propagation and magnetic field structures in galactic environments. We present VLA C-configuration S-band (2–4 GHz) observations of the spiral galaxy NGC 3556, a target from the Continuum Halos in Nearby Galaxies—an EVLA Survey. We estimate the thermal contribution to the radio emission from a combination of the Hα and mid-IR data, and employ rotation measure synthesis to reveal the magnetic field structures. In our data, NGC 3556 exhibits a box-like radio halo extending nearly 7 kpc from the galactic plane. The

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Sjouwerman, L. O., Y. M. Pihlström, R. M. Rich, M. J. Claussen, and M. R. Morris. "Stellar SiO masers in the Galaxy: The Bulge Asymmetries and Dynamic Evolution (BAaDE) survey." Proceedings of the International Astronomical Union 13, S336 (2017): 180–83. http://dx.doi.org/10.1017/s1743921317009292.

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AbstractCircumstellar SiO masers can be observed in red giant evolved stars throughout the Galaxy. Since stellar masers are not affected by non-gravitational forces, they serve as point-mass probes of the gravitational potential and form an excellent sample for studies of the Galactic structure and dynamics. Compared to optical studies, the non-obscured masers are in particular valuable when observed close to the highly obscured Galactic Bulge and Plane. Their line-of-sight velocities can easily be obtained with high accuracy, proper motions can be measured and distances can be estimated. Furt

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Rajpurohit, K., E. O’Sullivan, G. Schellenberger, et al. "A Deep Dive into the NGC 741 Galaxy Group: Insights into a Spectacular Head-tail Radio Galaxy from VLA, MeerKAT, uGMRT, and LOFAR." Astrophysical Journal 976, no. 1 (2024): 64. http://dx.doi.org/10.3847/1538-4357/ad8136.

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Abstract We present deep, wideband multifrequency radio observations (144 MHz−8 GHz) of the remarkable galaxy group NGC 741, which yield crucial insights into the interaction between the infalling head-tail radio galaxy (NGC 742) and the main group. Our new data provide an unprecedentedly detailed view of the NGC 741-742 system, including the shock cone, disrupted jets from NGC 742, the long (∼255 kpc) braided southern radio tail, and the eastern lobe-like structure (∼100 kpc), and reveal, for the first time, complex radio filaments throughout the tail and lobe, and a likely vortex ring behind

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De Simone, Marta, Cecilia Ceccarelli, Claudio Codella, et al. "Tracking the Ice Mantle History in the Solar-type Protostars of NGC 1333 IRAS 4." Astrophysical Journal Letters 935, no. 1 (2022): L14. http://dx.doi.org/10.3847/2041-8213/ac85af.

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Abstract To understand the origin of the diversity observed in exoplanetary systems, it is crucial to characterize the early stages of their formation, represented by solar-type protostars. Likely, the gaseous chemical content of these objects directly depends on the composition of the dust-grain mantles formed before the collapse. Directly retrieving the ice mantle composition is challenging, but it can be done indirectly by observing the major components, such as NH3 and CH3OH at centimeter wavelengths, once they are released into the gas phase during the warm protostellar stage. We observed

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Rajpurohit, K., R. J. van Weeren, M. Hoeft, et al. "Deep Low-frequency Radio Observations of A2256. I. The Filamentary Radio Relic." Astrophysical Journal 927, no. 1 (2022): 80. http://dx.doi.org/10.3847/1538-4357/ac4708.

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Abstract We present deep and high-fidelity images of the merging galaxy cluster A2256 at low frequencies using the upgraded Giant Metrewave Radio Telescope (uGMRT) and LOw-Frequency ARray (LOFAR). This cluster hosts one of the most prominent known relics with a remarkably spectacular network of filamentary substructures. The new uGMRT (300–850 MHz) and LOFAR (120–169 MHz) observations, combined with the archival Karl G. Jansky Very Large Array (VLA; 1–4 GHz) data, allowed us to carry out the first spatially resolved spectral analysis of the exceptional relic emission down to 6″ resolution over

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Xie, C., R. J. van Weeren, L. Lovisari, et al. "The discovery of radio halos in the frontier fields clusters Abell S1063 and Abell 370." Astronomy & Astrophysics 636 (April 2020): A3. http://dx.doi.org/10.1051/0004-6361/201936953.

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Context. Massive merging galaxy clusters often host diffuse megaparsec-scale radio synchrotron emission. This emission originates from relativistic electrons in the ionized intracluster medium. An important question is how these synchrotron emitting relativistic electrons are accelerated. Aims. Our aim is to search for diffuse emission in the Frontier Fields clusters Abell S1063 and Abell 370 and characterize its properties. While these clusters are very massive and well studied at some other wavelengths, no diffuse emission has been reported for these clusters so far. Methods. We obtained 325

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Kappes, A., M. Perucho, M. Kadler, P. R. Burd, L. Vega-García, and M. Brüggen. "LOFAR measures the hotspot advance speed of the high-redshift blazar S5 0836+710." Astronomy & Astrophysics 631 (October 17, 2019): A49. http://dx.doi.org/10.1051/0004-6361/201936164.

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Context. The emission and proper motion of the terminal hotspots of active galactic nucleus (AGN) jets can be used as a powerful probe of the intergalactic medium. However, measurements of hotspot advance speeds in active galaxies are difficult, especially in the young universe, because of the low angular velocities and the low brightness of distant radio galaxies. Aims. Our goal is to study the termination of an AGN jet in the young universe and to deduce physical parameters of the jet and the intergalactic medium. Methods. We used the LOw Frequency ARray (LOFAR) to image the long-wavelength

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Kovalevsky, J. "Optical-Radio Reference Ties." International Astronomical Union Colloquium 165 (1997): 447–48. http://dx.doi.org/10.1017/s0252921100046935.

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In the course of the Hipparcos data reduction, the system of coordinates obtained is the result of complicated and partly random processes. It is therefore an arbitrary system which could not be retained. It was decided to compute a rotation ϵ at epoch (1991.25) and a time-dependent rotation ω (or spin) such that, when applied, it would be a realisation of the IAU extragalactic reference system as defined in 1991 and implemented by IERS in 1995.A working group was set up by the Hipparcos Science Team with the task to provide these rotations from all possible techniques. Actually eleven indepen

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