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Artículos de revistas sobre el tema "Deep long-slit spectroscopy"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 12 de febrero de 2022

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1

Guzzo, L., I. J. Danziger, S. Cristiani, and P. A. Shaver. "The Interaction of the Quasar PKS 0812+02 with the Surrounding Cluster of Galaxies." Symposium - International Astronomical Union 130 (1988): 573–74. http://dx.doi.org/10.1017/s0074180900137015.

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We present the results of long slit spectroscopy and deep imaging of the quasar PKS 0812+02 and its environment, obtained with the ESO 3.6m telescope using the ESO Faint Object Spectrograph and Camera (EFOSC) and the Boller and Chivens spectrograph.
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2

Vilchez, J. M., J. Cepa, and C. Esteban. "Ionized Gas and Stellar Content in a Sample of HII Galaxies." International Astronomical Union Colloquium 120 (1989): 353–58. http://dx.doi.org/10.1017/s0252921100024088.

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AbstractWe present the first results of an extensive study of the stellar content and the ionized gas structure for a sample of BCGs. Deep broad (BVRI Johnson) and narrow (Hα) CCD images have been obtained for about 25 galaxies. For a subset of objects, selected on the basis of their apparent structure, long-slit spectroscopy has also been obtained in order to investigate the interaction between the underlying stellar population and the ionized gas.
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3

López, J. A., M. Tapia, and M. Roth. "A Symmetric Jet-Like Structure in the Planetary Nebula FG 1." Symposium - International Astronomical Union 155 (1993): 203. http://dx.doi.org/10.1017/s0074180900170652.

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Fg 1 (He 2–66) is a southern planetary nebula that presents an elliptical shape. Deep CCD imaging and long-slit spectroscopy have been obtained at Las Campanas Observatory of this object. The images were obtained in the light of Hα+[NII], [SII] λλ6716,6731, HeII λ4686 and in the broad-band Rgunn filter. The spectra were obtained oriented N-S, P.A. 90°, and P.A. 85°. The instrumental combination yields a spectral resolution of ∼ 2 Å FWHM, covering a spectral range ≃ λλ 6290–6805 Å.
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4

Günster, Philip, and Dominik J. Bomans. "On the nature of the peculiar superthin LSB galaxy UGC 12281." Proceedings of the International Astronomical Union 7, S284 (2011): 138–40. http://dx.doi.org/10.1017/s1743921312008927.

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AbstractUGC 12281 has been classified as having a pure disk and being a low surface brightness galaxy (LSBG), thus being an obvious member of the so-called superthin galaxies. At the same time it represents an extremely untypical type of LSBG due to its remarkable amount of current star formation and evidence for extraplanar ionized gas. This makes it become a perfect tool to investigate the triggering of star formation in LSB galaxies, located in an alleged isolated area. By means of deep photometry and long-slit spectroscopy we analyse the Hα halo and verify the existence of a potential dwar
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5

Bührke, Th, and R. Mundt. "HH 34: The bow shock of a jet." Symposium - International Astronomical Union 122 (1987): 175–76. http://dx.doi.org/10.1017/s0074180900156311.

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Deep CCD imaging of HH 34 in H∝ shows that the HH-object has a bow shock-like structure, of which the wings can be traced over about 1 arcmin ( pc). A knotty jet is pointing towards the apex of the bow shock structure. Long-slit spectroscopy reveals that 1) the jet has approximately a constant radial velocity and electron density. 2). The spectrum of the jet is of a much lower excitation than that of HH 34. 3) HH 34 has a complex velocity and line excitation structure. The extended bow shock is interpreted by a jet of which the working surface is propagating with high velocity (≈ 200 km/s) thr
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6

Stover, R. J., W. E. Brown, D. K. Gilmore, and M. Wei. "Design and Fabrication of Large CCDs for the Keck Observatory DEIMOS Spectrograph." Symposium - International Astronomical Union 167 (1995): 19–26. http://dx.doi.org/10.1017/s0074180900056229.

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The Keck II Deep Imaging Multi-Object Spectrograph (DEIMOS) is a general purpose, faint object, multi-slit, double-beam spectrograph which offers wide spectral coverage, high spectral resolution, high throughput, and long slit length on the sky. This powerful instrument will be the principal optical spectrograph on the Keck II telescope. DEIMOS is optimized for faint-object spectroscopy of individual point sources, low-surface-brightness extended objects, or widely distributed samples of faint objects on the sky. To obtain high resolution (∼ 1 å) and wide spectral coverage (up to 5000 å) the s
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7

Fossati, M., J. T. Mendel, A. Boselli, et al. "A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE)." Astronomy & Astrophysics 614 (June 2018): A57. http://dx.doi.org/10.1051/0004-6361/201732373.

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The Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE) is a blind narrow-band Hα + [NII] imaging survey carried out with MegaCam at the Canada-France-Hawaii Telescope. During pilot observations taken in the spring of 2016 we observed NGC 4330, an intermediate mass (M* ≃ 109.8 M⊙) edge-on star forming spiral currently falling into the core of the Virgo cluster. While previous Hα observations showed a clumpy complex of ionised gas knots outside the galaxy disc, new deep observations revealed a low surface brightness ~10 kpc tail exhibiting a peculiar filamentary structure. The fil
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8

Rodríguez-Eugenio, Nayra, Kai G. Noeske, Jose Acosta-Pulido, Francisco Prada та Arturo Manchado. "Star Formation Rates of a z~1 DEEP2 Galaxy Sample from LIRIS Multi-slit Hα Spectroscopy". Proceedings of the International Astronomical Union 2, S235 (2006): 417–18. http://dx.doi.org/10.1017/s1743921306010453.

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AbstractWe present preliminary results of Hα near-infrared (NIR) spectroscopy of 16 galaxies with redshifts in the range 0.8 ≤ z ≤ 1.0 drawn from the DEEP2 Galaxy Redshift Survey. The spectra were taken using the multi-slit mode of LIRIS (Long-slit Intermediate Resolution Infrared Spectrograph), installed at the 4.2-m WHT. Twelve out of 16 spectra yield robust (>5σ) Hα detections. We compare star formation rates (SFRs) from Hα luminosities to those derived from DEEP2 rest-frame UV measurements. This study is part of a larger program to obtain accurate Hα luminosities of about 50 star-formin
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9

Riera, A., B. Balick, G. Mellema, K. Xilouris, and Y. Terzian. "Abundances variations in PNe: Real or Illusory?" Symposium - International Astronomical Union 180 (1997): 274. http://dx.doi.org/10.1017/s007418090013092x.

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In order to study the putative enrichment within a PN, we have undertaken deep long-slit spectroscopic observations of selected targets in which we expected to find clear evidence of abundance gradients. The targets include NGC 3242: one of the PNs studied by Balick et al. (1994) in which they report N/H enhancements of ∼ 5 in each FLIER; M1-18, M1-8, M3-3, NGC 6537 and Hubble 5. The observations were obtained at the 5-m Hale Telescope of the Palomar Observatory.
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10

Solf, J., and K. ‐H Bohm. "A Deep Long‐Slit Spectroscopic Study of the Two Bipolar Outflows from the T Tauri Binary System." Astrophysical Journal 523, no. 2 (1999): 709–20. http://dx.doi.org/10.1086/307760.

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11

Koutchmy, S., F. Baudin, Sh Abdi, L. Golub, and F. Sèvre. "New deep coronal spectra from the 2017 total solar eclipse." Astronomy & Astrophysics 632 (December 2019): A86. http://dx.doi.org/10.1051/0004-6361/201935681.

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Context. The origin of the high temperature of the solar corona, in both the inner bright parts and the more outer parts showing flows toward the solar wind, is not understood well yet. Total eclipses permit a deep analysis of both the inner and the outer parts of the corona using the continuum white-light (W-L) radiations from electrons (K-corona), the superposed spectrum of forbidden emission lines from ions (E-corona), and the dust component with F-lines (F-corona). Aims. By sufficiently dispersing the W-L spectrum, the Fraunhofer (F) spectrum of the dust component of the corona appears and
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12

Luo, S. G., and X. W. Liu. "A Spatially Resolved Spectroscopic Study of NGC 7009." Symposium - International Astronomical Union 209 (2003): 393–94. http://dx.doi.org/10.1017/s0074180900209169.

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Liu et al. (1995) and Luo, Liu & Barlow (2001) determined the CNONe abundances in NGC 7009 using optical recombination lines (ORLs) and found that they are all approximately a factor of five higher than the corresponding values derived from collisionally excited lines (CELs). We have obtained new deep high resolution long-slit spectra of NGC 7009. The data have been used to map the electron temperature, density and element abundances across the nebula, using both CELs and ORLs. While the electron temperature derived from the [O III] forbidden line ratio, Te([O III]), is found to be largely
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13

Saburova, Anna S., Igor V. Chilingarian, Anastasia V. Kasparova, et al. "Observational insights on the origin of giant low surface brightness galaxies." Monthly Notices of the Royal Astronomical Society 503, no. 1 (2021): 830–49. http://dx.doi.org/10.1093/mnras/stab374.

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ABSTRACT Giant low surface brightness galaxies (gLSBGs) with dynamically cold stellar discs reaching the radius of 130 kpc challenge currently considered galaxy formation mechanisms. We analyse new deep long-slit optical spectroscopic observations, archival optical images, and published Hi and optical spectroscopic data for a sample of seven gLSBGs, for which we performed mass modelling and estimated the parameters of dark matter haloes assuming the Burkert dark matter density profile. Our sample is not homogeneous by morphology, parameters of stellar populations, and total mass, however, six
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14

Kasparova, Anastasia V., Ivan Yu Katkov, and Igor V. Chilingarian. "An excessively massive thick disc of the enormous edge-on lenticular galaxy NGC 7572." Monthly Notices of the Royal Astronomical Society 493, no. 4 (2020): 5464–78. http://dx.doi.org/10.1093/mnras/staa611.

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ABSTRACT Galactic discs are known to have a complex multilayer structure. An in-depth study of the stellar population properties of the thin and thick components can elucidate the formation and evolution of disc galaxies. Even though thick discs are ubiquitous, their origin is still debated. Here we probe the thick disc formation scenarios by investigating NGC 7572, an enormous edge-on galaxy having R25 ≈ 25 kpc and Vrot ≈ 370 km s−1, which substantially exceeds the Milky Way size and mass. We analysed DECaLS archival imaging and found that the disc of NGC 7572 contains two flaring stellar dis
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15

Shukla, Gitika, Raghunathan Srianand, Neeraj Gupta та ін. "Lyman-α emission from a WISE-selected optically faint powerful radio galaxy M151304.72-252439.7 at z = 3.132*". Monthly Notices of the Royal Astronomical Society, 28 грудня 2020. http://dx.doi.org/10.1093/mnras/staa3977.

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Abstract We report the detection of a large (∼90 kpc) and luminous Lyα nebula [LLyα = (6.80±0.08) × 1044 $\rm {\, erg\, s^{-1}}$] around an optically faint (r>23 mag) radio galaxy M1513-2524 at zem=3.132. The double-lobed radio emission has an extent of 184 kpc, but the radio core, i.e., emission associated with the active galactic nucleus (AGN) itself, is barely detected. This object was found as part of our survey to identify high-z quasars based on Wide-field Infrared Survey Explorer (WISE) colors. The optical spectrum has revealed Lyα, N v, C iv and He ii emission lines with a very
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