Einloggen

Thematische Bibliographien / AGN activity / Zeitschriftenartikel

Um die anderen Arten von Veröffentlichungen zu diesem Thema anzuzeigen, folgen Sie diesem Link: AGN activity.

Zeitschriftenartikel zum Thema „AGN activity“

Autor: Grafiati

Veröffentlicht am 26. Juni 2021

Zuletzt aktualisiert am 17. Februar 2022

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an

Wählen Sie eine Art der Quelle aus:

Machen Sie sich mit Top-50 Zeitschriftenartikel für die Forschung zum Thema "AGN activity" bekannt.

Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.

Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.

Sehen Sie die Zeitschriftenartikel für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.

1

Umemura, Masayuki, Jun Fukue, and Shin Mineshige. "AGN activity triggered by circumnuclear starbursts." Advances in Space Research 23, no. 5-6 (1999): 1095–100. http://dx.doi.org/10.1016/s0273-1177(99)00238-0.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Li, Cheng, Guinevere Kauffmann, Timothy M. Heckman, Simon D. M. White, and Y. P. Jing. "Interactions, star formation and AGN activity." Monthly Notices of the Royal Astronomical Society 385, no. 4 (2008): 1915–22. http://dx.doi.org/10.1111/j.1365-2966.2008.13023.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Amiri, Amirnezam. "Role of environment on AGN activity." Proceedings of the International Astronomical Union 15, S356 (2019): 171. http://dx.doi.org/10.1017/s1743921320002835.

Der volle Inhalt der Quelle

Annotation:

AbstractMotivated by the apparently conflicting results reported in the literature on the effect of environment on nuclear activity, we have carried out a new analysis by comparing the fraction of galaxies hosting active galactic nuclei (AGNs) in the most overdense regions (rich galaxy clusters) and the most underdense ones (voids) in the local universe. Exploiting the classical BPT diagnostics, we have extracted volume limited samples of star forming and AGN galaxies. We find that, at variance with star-forming galaxies, AGN galaxies have similar distributions of specific star formation rates

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Man, Zhong-yi, Ying-jie Peng, Xu Kong, Ke-xin Guo, Cheng-peng Zhang, and Jing Dou. "The dependence of AGN activity on environment in SDSS." Monthly Notices of the Royal Astronomical Society 488, no. 1 (2019): 89–98. http://dx.doi.org/10.1093/mnras/stz1706.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT Environment is one of the key external drivers of the galaxies, while active galactic nucleus (AGN) is one of the key internal drivers. Both of them play fundamental roles in regulating the formation and evolution of galaxies. We explore the interrelationship between environment and AGN in SDSS. At a given stellar mass, the specific star formation rate distribution of the AGN host galaxies remains unchanged with overdensity, with the peak of the distribution around the Green Valley. We show that, at a given stellar mass, the AGN fraction that has been commonly used in previous studies

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

González Delgado, R. M., C. N. Tadhunter, E. Pérez, M. Villar-Martín, J. Holt, and J. Rodríguez. "The relation between mergers and AGN activity." Astronomische Nachrichten 327, no. 2-3 (2006): 159–66. http://dx.doi.org/10.1002/asna.200510499.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

De Rosa, A., S. Bianchi, T. Bogdanović, et al. "Unveiling multiple AGN activity in galaxy mergers." Astronomische Nachrichten 338, no. 2-3 (2017): 262–68. http://dx.doi.org/10.1002/asna.201713340.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Noordeh, E., R. E. A. Canning, A. King, et al. "The environmental dependence of X-ray AGN activity at z ∼ 0.4." Monthly Notices of the Royal Astronomical Society 498, no. 3 (2020): 4095–108. http://dx.doi.org/10.1093/mnras/staa2682.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT We present an analysis of the X-ray active galactic nucleus (AGN) population in a sample of seven massive galaxy clusters in the redshift range 0.35 &lt; z &lt; 0.45. We utilize high-quality Chandra X-ray imaging to robustly identify AGN and precisely determine cluster masses and centroids. Follow-up VIsible Multi-Object Spectrograph optical spectroscopy allows us to determine which AGN are cluster members. Studying the subset of AGN with 0.5–8 keV luminosities &gt;6.8 × 1042 erg s−1, within r ≤ 2r500 (approximately the virial radius), we find that the cluster AGN space de

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Farrah, D., J. Afonso, A. Efstathiou, M. Rowan-Robinson, M. Fox, and D. Clements. "Starburst and AGN activity in ultraluminous infrared galaxies." Monthly Notices of the Royal Astronomical Society 343, no. 2 (2003): 585–607. http://dx.doi.org/10.1046/j.1365-8711.2003.06696.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Blank, Marvin, and Wolfgang J. Duschl. "Viscous time lags between starburst and AGN activity." Monthly Notices of the Royal Astronomical Society 462, no. 2 (2016): 2246–55. http://dx.doi.org/10.1093/mnras/stw1804.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Foord, Adi, Elena Gallo, Edmund Hodges-Kluck, et al. "AGN Activity in Nucleated Galaxies as Measured byChandra." Astrophysical Journal 841, no. 1 (2017): 51. http://dx.doi.org/10.3847/1538-4357/aa6d63.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

11

Santos, Daryl Joe D., Tomotsugu Goto, Seong Jin Kim, et al. "Environmental effects on AGN activity via extinction-free mid-infrared census." Monthly Notices of the Royal Astronomical Society 507, no. 2 (2021): 3070–88. http://dx.doi.org/10.1093/mnras/stab2352.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT How does the environment affect active galactic nucleus (AGN) activity? We investigated this question in an extinction-free way by selecting 1120 infrared (IR) galaxies in the AKARI North Ecliptic Pole Wide field at redshift z ≤ 1.2. A unique feature of the AKARI satellite is its continuous nine-band IR filter coverage, providing us with an unprecedentedly large sample of IR spectral energy distributions (SEDs) of galaxies. By taking advantage of this, for the first time, we explored the AGN activity derived from SED modelling as a function of redshift, luminosity, and environment. We

APA, Harvard, Vancouver, ISO und andere Zitierweisen

12

Paronyan, Gurgen M., Gohar S. Harutyunyan, and Areg M. Mickaelian. "Activity types for X-ray candidate AGN from SDSS." Proceedings of the International Astronomical Union 9, S304 (2013): 166–67. http://dx.doi.org/10.1017/s1743921314003664.

Der volle Inhalt der Quelle

Annotation:

AbstractThe Joint Catalogue of Hamburg ROSAT Sources (HRC/BHRC) is the result of merging of HRC and BHRC catalogs built on the basis of optical identifications of ROSAT BSC and ROSAT FSC. Altogether, 8132 sources are present. Based on this catalogue, we have compiled a sample of ROSAT AGN, including candidate ones. In this paper we classify candidate AGN (those that previously had not been spectroscopically classified) by their activity type. The sample contains 955 objects with count rate of photons CR>0.04 ct/s in the area with galactic latitudes |b|>30 and declinations δ>0, however

APA, Harvard, Vancouver, ISO und andere Zitierweisen

13

Sani, Eleonora. "AGN/Starburst Connection." Acta Polytechnica CTU Proceedings 1, no. 1 (2014): 84–89. http://dx.doi.org/10.14311/app.2014.01.0084.

Der volle Inhalt der Quelle

Annotation:

Two main physical processes characterize the activity in the nuclear region of active galaxies: an intense star formation (starburst, SB) and an Active Galactic Nucleus (AGN). While the existence of a starburst-AGN connection is undisputed, still it is not clear which process dominates the energetic output in both local and high redshift Universe. Moreover there is no consensus on whether AGN fueling is synchronous with star formation or follows it during a post-starburst phase. Here I first review how to disentangle the relative SB-AGN contribution, then I focus on the physical and geometrica

APA, Harvard, Vancouver, ISO und andere Zitierweisen

14

Mickaelian, A. M., H. V. Abrahamyan, G. S. Harutyunyan, and G. M. Paronyan. "Revised activity types for Markarian galaxies." Proceedings of the International Astronomical Union 9, S304 (2013): 41–42. http://dx.doi.org/10.1017/s1743921314003263.

Der volle Inhalt der Quelle

Annotation:

AbstractThe sample of Markarian galaxies consists of 1515 UV-excess galaxies containing many active galaxies, both AGN and Starburst (SB). Several catalogs of Markarian galaxies have been published; however activity types are based on old spectroscopic data. The SDSS spectroscopy and some other recent spectral observations allow classify or re-classify many of Markarian galaxies, altogether we have retrieved and studied 779 SDSS and 300 other spectra. Out of 779 SDSS spectra, we have classified 533 HII, 31 Composites, 12 LINERs, 4 S2.0, 5 S1.9, 8 S1.8, 5 NLS1.5, 11 S1.5, 8 NLS1.2, 21 S1.2, 4 N

APA, Harvard, Vancouver, ISO und andere Zitierweisen

15

Wang, Kunjie, Yanping Wu, Hongxia Li, et al. "Synthesis, characterization and antimicrobial activity of silver nanoparticles: Agn(NALC)m and Agn(GSHR)m." RSC Advances 4, no. 10 (2014): 5130. http://dx.doi.org/10.1039/c3ra46568c.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

16

Schmidt, Gary D. "Ubiquitous Disks in AGN." International Astronomical Union Colloquium 163 (1997): 152–61. http://dx.doi.org/10.1017/s0252921100042597.

Der volle Inhalt der Quelle

Annotation:

AbstractDisk-like structures have been inferred to exist in the nuclei of galaxies over the entire range in nuclear activity. These form the essence of the Unified Scheme, which has had great success in accounting for AGN of a wide variety of perceived types. Recent progress along this front is summarized, including new polarimetric results, high-angular resolution optical imaging, and interferometry at radio wavelengths.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

17

Poggianti, Bianca M., Callum Bellhouse, Tirna Deb, et al. "The role of environment on quenching, star formation and AGN activity." Proceedings of the International Astronomical Union 15, S359 (2020): 108–16. http://dx.doi.org/10.1017/s1743921320002070.

Der volle Inhalt der Quelle

Annotation:

AbstractGalaxies undergoing ram pressure stripping in clusters are an excellent opportunity to study the effects of environment on both the AGN and the star formation activity. We report here on the most recent results from the GASP survey. We discuss the AGN-ram pressure stripping connection and some evidence for AGN feedback in stripped galaxies. We then focus on the star formation activity, both in the disks and the tails of these galaxies, and conclude drawing a picture of the relation between multi-phase gas and star formation.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

18

Miraghaei, H., H. G. Khosroshahi, H. R. Klöckner, T. J. Ponman, N. N. Jetha, and S. Raychaudhury. "IGM Heating and AGN activity in Fossil Galaxy Groups." Proceedings of the International Astronomical Union 9, S304 (2013): 349–50. http://dx.doi.org/10.1017/s174392131400427x.

Der volle Inhalt der Quelle

Annotation:

AbstractFossil galaxy groups are energetically and morphologically ideal environments to study the intergalactic medium (IGM) heating, because their inter-galactic gas is undisturbed due to the lack of recent group scale mergers. We study the role of active galactic nuclei (AGN) in heating the IGM in a sample of five fossil galaxy groups by employing properties at 610 MHz and 1.4 GHz. We find that two of the dominant galaxies in fossil groups, ESO 3060170 and RX J1416.4+2315, are associated with the radio lobes. We evaluate the PdV work of the radio lobes and their corresponding heating power

APA, Harvard, Vancouver, ISO und andere Zitierweisen

19

McKernan, B., K. E. S. Ford, and C. S. Reynolds. "Black hole mass, host galaxy classification and AGN activity." Monthly Notices of the Royal Astronomical Society 407, no. 4 (2010): 2399–410. http://dx.doi.org/10.1111/j.1365-2966.2010.17068.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

20

Fanidakis, N., C. M. Baugh, A. J. Benson та ін. "Grand unification of AGN activity in the ΛCDM cosmology". Monthly Notices of the Royal Astronomical Society 410, № 1 (2010): 53–74. http://dx.doi.org/10.1111/j.1365-2966.2010.17427.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

21

Richards, A. M. S., J. H. Knapen, J. A. Yates, et al. "OH Megamasers, Starburst and AGN Activity in Markarian 231." Monthly Notices of the Royal Astronomical Society 364, no. 2 (2005): 353–66. http://dx.doi.org/10.1111/j.1365-2966.2005.09588.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

22

Florez, Jonathan, Shardha Jogee, Sydney Sherman, et al. "Exploring AGN and star formation activity of massive galaxies at cosmic noon." Monthly Notices of the Royal Astronomical Society 497, no. 3 (2020): 3273–96. http://dx.doi.org/10.1093/mnras/staa2200.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT We investigate the relation between active galactic nucleus (AGN) and star formation (SF) activity at 0.5 &lt; z &lt; 3 by analysing 898 galaxies with X-ray luminous AGNs (LX &gt; 1044 erg s−1) and a large comparison sample of ∼320 000 galaxies without X-ray luminous AGNs. Our samples are selected from a large (11.8 deg2) area in Stripe 82 that has multiwavelength (X-ray to far-IR) data. The enormous comoving volume (∼0.3 Gpc3) at 0.5 &lt; z &lt; 3 minimizes the effects of cosmic variance and captures a large number of massive galaxies (∼30 000 galaxies with M* &am

APA, Harvard, Vancouver, ISO und andere Zitierweisen

23

Zubovas, Kastytis. "AGN activity and nuclear starbursts: Sgr A* activity shapes the Central Molecular Zone." Monthly Notices of the Royal Astronomical Society 451, no. 4 (2015): 3627–42. http://dx.doi.org/10.1093/mnras/stv1173.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

24

Levenson, N. A. "Compton Thick AGN." Proceedings of the International Astronomical Union 9, S304 (2013): 112–18. http://dx.doi.org/10.1017/s1743921314003512.

Der volle Inhalt der Quelle

Annotation:

AbstractCompton thick active galactic nuclei (AGN), which are obscured by column density NH > 1.5 × 104 cm−2, can be difficult to identify. They are certainly cosmically significant, both in producing the observed cosmic X-ray background, and in providing a location where black hole growth is hidden from view. Here I review some recent results from surveys that provide indications of Compton thick AGN, considering X-ray, radio, and infrared selection techniques. I also offer a caution against using mid-infrared silicate features to measure line-of-sight obscuration to active galactic nuclei

APA, Harvard, Vancouver, ISO und andere Zitierweisen

25

Greenhill, L. J. "Masers in AGN environments." Proceedings of the International Astronomical Union 3, S242 (2007): 381–90. http://dx.doi.org/10.1017/s1743921307013439.

Der volle Inhalt der Quelle

Annotation:

AbstractGalactic nuclei are well known sources of OH and H2O maser emission. It appears that intense star formation in ultra-luminous infrared galaxies drives most OH sources. In contrast, nuclear activity appears to drive most H2O sources. When H2O emission originates in accretion disk structures, constrained geometry and dynamics enable robust interpretation of spectroscopic and imaging data. The principal science includes study of AGN geometry at parsec and sub-parsec radii and measurement of geometric distances in the Hubble Flow. New high accuracy estimates of the “Hubble constant, H○” ob

APA, Harvard, Vancouver, ISO und andere Zitierweisen

26

Filho, Mercedes E., Jarle Brinchmann, Catarina Lobo, and Sonia Antón. "Optically faint radio sources: reborn AGN?" Proceedings of the International Astronomical Union 7, S284 (2011): 231–33. http://dx.doi.org/10.1017/s174392131200912x.

Der volle Inhalt der Quelle

Annotation:

AbstractWe have discovered eight relatively strong radio sources that have no optical counterparts. A NIR follow-up has detected faint (17–20 mag) host galaxies in all targets. In general, the radio properties are similar to those observed in 3CRR sources but the optical-radio slopes are consistent with moderate to high redshift (z < 4) GHz-peaked spectrum sources. Our results suggest that these are galaxies whose black hole has been recently re-ignited into activity but that retain large-scale radio structures, signatures of previous AGN activity.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

27

Pović, Mirjana. "Development in astronomy in Ethiopia and East-Africa through nuclear activity in galaxies." Proceedings of the International Astronomical Union 15, S356 (2019): 3–8. http://dx.doi.org/10.1017/s174392132000246x.

Der volle Inhalt der Quelle

Annotation:

AbstractIn this paper we summarise the research that is currently going on in Ethiopia and East-Africa in extragalactic astronomy and physics of active galaxies and active galactic nuclei (AGN). The study is focused on some of the still open questions such as: what are the stellar ages and populations of ultra hard X-ray detected AGN and connection between AGN and their host galaxies?, what are the properties of AGN in galaxy clusters and the role that environment has in triggering nuclear activity?, what are the morphological properties of AGN and how precisely we can deal with morphological

APA, Harvard, Vancouver, ISO und andere Zitierweisen

28

Stemo, Aaron, Julia M. Comerford, R. Scott Barrows, Daniel Stern, Roberto J. Assef, and Roger L. Griffith. "A Catalog of AGN Host Galaxies Observed with HST/ACS: Correlations between Star Formation and AGN Activity." Astrophysical Journal 888, no. 2 (2020): 78. http://dx.doi.org/10.3847/1538-4357/ab5f66.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

29

Pimbblet, K. A., S. S. Shabala, C. P. Haines, A. Fraser-McKelvie, and D. J. E. Floyd. "The drivers of AGN activity in galaxy clusters: AGN fraction as a function of mass and environment." Monthly Notices of the Royal Astronomical Society 429, no. 2 (2012): 1827–39. http://dx.doi.org/10.1093/mnras/sts470.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

30

Lee, Hyo Jeong, Hyo Jung Lee, Eun Ok Lee, et al. "In vivo Anti-Cancer Activity of Korean Angelica Gigas and its Major Pyranocoumarin Decursin." American Journal of Chinese Medicine 37, no. 01 (2009): 127–42. http://dx.doi.org/10.1142/s0192415x09006722.

Der volle Inhalt der Quelle

Annotation:

We have reported that a 10-herbal traditional formula containing Korean Angelica gigas Nakai (AGN) exerts potent anti-cancer efficacy and identified decursin and decursinol angelate (DA) from AGN as novel anti-androgens. Here, we determined whether AGN would exert in vivo anti-cancer activity and whether decursin or DA could account for its efficacy. The AGN ethanol extract was tested against the growth of mouse Lewis lung cancer (LLC) allograft in syngenic mice or human PC-3 and DU145 prostate cancer xenograft in immunodeficient mice. The pharmacokinetics of decursin and DA were determined. T

APA, Harvard, Vancouver, ISO und andere Zitierweisen

31

Puccetti, S., F. Fiore, A. Bongiorno, K. Boutsia, R. Fassbender, and M. Verdugo. "Triggering nuclear and galaxy activity in the Bullet cluster." Astronomy & Astrophysics 634 (February 2020): A137. http://dx.doi.org/10.1051/0004-6361/201833601.

Der volle Inhalt der Quelle

Annotation:

The analysis of a cluster environment is a valuable instrument to investigate the origin of gas fuelling and trigger mechanisms in active galactic nuclei (AGN) and star-forming galaxies. To this purpose, we present a detailed analysis of the point-like X-ray sources in the Bullet cluster field. Based on ∼600 ks Chandra observations, we produced a catalogue of 381 X-ray point sources up to a distance of ∼1.5 virial radius and with flux limits ∼1 × 10−16 and ∼8 × 10−16 erg cm−2 s−1 in the 0.5–2 keV and 2–10 keV bands, respectively. We find a strong (up to a factor 1.5–2) and significant (≥4σ) ov

APA, Harvard, Vancouver, ISO und andere Zitierweisen

32

Abrahamyan, Hayk V., and Areg M. Mickaelian. "Radio Properties of AGN." Proceedings of the International Astronomical Union 9, S304 (2013): 102–3. http://dx.doi.org/10.1017/s1743921314003469.

Der volle Inhalt der Quelle

Annotation:

AbstractTo study the radio properties of AGN, we cross-correlate and investigate Veron-Cetty & Veron catalog of QSOs and Active Galaxies (v.13, 2010) with a number of radio catalogs: NVSS, FIRST, GB6, 87GB, SUMSS, WISH, WENSS, and 7C. This catalog contains 168,940 objects with positional accuracy of mostly 1 arcsec, though many positions have larger errors. We use new cross-correlation software based on accuracy of each object independently. In this software we take into account errors for each source and take identifications with errors within 3 sigma. Altogether, we find ~16,000 AGN havi

APA, Harvard, Vancouver, ISO und andere Zitierweisen

33

Travascio, A., A. Bongiorno, P. Tozzi, et al. "Multiple AGN activity during the BCG assembly of XDCPJ0044.0-2033 at z ∼ 1.6." Monthly Notices of the Royal Astronomical Society 498, no. 2 (2020): 2719–33. http://dx.doi.org/10.1093/mnras/staa2495.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT Undisturbed galaxy clusters are characterized by a massive and large elliptical galaxy at their centre, i.e. the brightest cluster galaxy (BCG). How these central galaxies form is still debated. According to most models, a typical epoch for their assembly is $z$ ∼ 1–2. We have performed a detailed multiwavelength analysis of the core of XMM–Newton Distant Cluster Project (XDCP) J0044.0-2033 (XDCP0044), one of the most massive and densest galaxy clusters currently known at redshift $z$ ∼ 1.6, whose central galaxy population shows high star formation compared to lower z clusters and an

APA, Harvard, Vancouver, ISO und andere Zitierweisen

34

Laporte, Nicolas, Kimihiko Nakajima, Richard S. Ellis, et al. "A Spectroscopic Search for AGN Activity in the Reionization Era." Astrophysical Journal 851, no. 1 (2017): 40. http://dx.doi.org/10.3847/1538-4357/aa96a8.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

35

Blank, M., and W. J. Duschl. "Time lags between starburst and AGN activity in galaxy mergers." Proceedings of the International Astronomical Union 9, S303 (2013): 379–81. http://dx.doi.org/10.1017/s1743921314000957.

Der volle Inhalt der Quelle

Annotation:

AbstractWe show that the observed time lag between starburst and AGN activity can be explained by a viscous time lag the gas needs to flow through the AGN's accretion disk before reaching the central black hole. Our calculations reproduce the observed time lag and are in agreement with the observed correlation between black hole mass and stellar velocity dispersion.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

36

Irwin, Judith A., Philip Schmidt, A. Damas-Segovia, et al. "CHANG-ES – VIII. Uncovering hidden AGN activity in radio polarization." Monthly Notices of the Royal Astronomical Society 464, no. 2 (2016): 1333–46. http://dx.doi.org/10.1093/mnras/stw2414.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

37

Hopkins, Philip F. "Dynamical delays between starburst and AGN activity in galaxy nuclei." Monthly Notices of the Royal Astronomical Society: Letters 420, no. 1 (2011): L8—L12. http://dx.doi.org/10.1111/j.1745-3933.2011.01179.x.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

38

Jia, Zixian, Viktor Nadtochenko, Marina A. Radzig, et al. "Antibacterial activity of monolayer nanoparticulate AgN-(titanium-oxo-alkoxy) coatings." Mechanics & Industry 17, no. 5 (2016): 504. http://dx.doi.org/10.1051/meca/2015108.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

39

Giacintucci, S., T. Venturi, S. Bardelli, D. Dallacasa, and E. Zucca. "AGN and starburst radio activity in the A3558 cluster complex." Astronomy & Astrophysics 419, no. 1 (2004): 71–87. http://dx.doi.org/10.1051/0004-6361:20040071.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

40

Spinoglio, Luigi, and Juan Antonio Fernández-Ontiveros. "AGN types and unification model." Proceedings of the International Astronomical Union 15, S356 (2019): 29–43. http://dx.doi.org/10.1017/s1743921320002549.

Der volle Inhalt der Quelle

Annotation:

AbstractThe motivation of the “unified model” is to explain the main properties of the large zoo of active galactic nuclei with a single physical object. The discovery of broad permitted lines in the polarized spectrum of type 2 Seyfert galaxies in the mid 80’s led to the idea of an obscuring torus, whose orientation with respect to our line of sight was the reason of the different optical spectra. However, after many years of observations with different techniques, including IR and mm interferometry, the resulting properties of the observed dust structures differ from the torus model that wou

APA, Harvard, Vancouver, ISO und andere Zitierweisen

41

Bonzini, M., V. Mainieri, P. Padovani, et al. "Host galaxy properties of radio selected AGN." Proceedings of the International Astronomical Union 9, S304 (2013): 343–44. http://dx.doi.org/10.1017/s1743921314004244.

Der volle Inhalt der Quelle

Annotation:

AbstractWith the goal of investigating the link between black hole (BH) and star formation (SF) activity, we study a deep sample of radio selected star forming galaxies (SFGs) and active galactic nuclei (AGNs). Using a multi-wavelength approach we characterize their host galaxies properties (stellar masses, optical colors, and morphology). Moreover, comparing the star formation rate derived from the radio and far-infrared luminosity, we found evidences that the main contribution to the radio emission in the radio-quiet AGNs is star-formation activity in their host galaxy.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

42

Torbaniuk, O., M. Paolillo, F. Carrera, et al. "The connection between star formation and supermassive black hole activity in the local Universe." Monthly Notices of the Royal Astronomical Society 506, no. 2 (2021): 2619–37. http://dx.doi.org/10.1093/mnras/stab1794.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT We study the nuclear (AGN) activity in the local Universe (z &lt; 0.33) and its correlation with the host galaxy properties, derived from a Sloan Digital Sky Survey sample with spectroscopic star-formation rate (SFR) and stellar mass determination. To quantify the level of AGN activity we used the XMM-Newton Serendipitous Source Catalogue. Applying multiwavelength selection criteria (optical BPT-diagrams, X-ray/optical ratio etc), we found that 24 per cent of the detected sources are efficiently-accreting AGN with moderate-to-high X-ray luminosity, twice as likely to be hosted by

APA, Harvard, Vancouver, ISO und andere Zitierweisen

43

Koulouridis, Elias. "The AGN dependence on cluster mass." Proceedings of the International Astronomical Union 14, S342 (2018): 145–48. http://dx.doi.org/10.1017/s1743921318005124.

Der volle Inhalt der Quelle

Annotation:

AbstractWe present the results of a study of the AGN density in a homogeneous and well studied sample of 167 bona-fide X-ray galaxy clusters (0.1<z<0.5). Our aim is to study the AGN activity in 167 XXL X-ray galaxy clusters as a function of the cluster mass and the location of the AGN in the cluster. We report a significant AGN excess in our low-mass cluster sub-sample between 0.5r500 and 2r500. In contrast, the high-mass sub-sample presents no AGN excess. The AGN excess in poor clusters indicates AGN triggering, supporting previous studies that reported enhanced galaxy merging in the cl

APA, Harvard, Vancouver, ISO und andere Zitierweisen

44

Bongiorno, Angela, and Andrea Travascio. "The role of AGN activity in the building up of the BCG at z ∼ 1.6." Proceedings of the International Astronomical Union 15, S356 (2019): 280–84. http://dx.doi.org/10.1017/s1743921320003105.

Der volle Inhalt der Quelle

Annotation:

AbstractXDCPJ0044.0-2033 is one of the most massive galaxy cluster at z ∼1.6, for which a wealth of multi-wavelength photometric and spectroscopic data have been collected during the last years. I have reported on the properties of the galaxy members in the very central region (∼ 70kpc × 70kpc) of the cluster, derived through deep HST photometry, SINFONI and KMOS IFU spectroscopy, together with Chandra X-ray, ALMA and JVLA radio data.In the core of the cluster, we have identified two groups of galaxies (Complex A and Complex B), seven of them confirmed to be cluster members, with signatures of

APA, Harvard, Vancouver, ISO und andere Zitierweisen

45

Kokotanekov, G., M. W. Wise, M. de Vries, and H. T. Intema. "Signatures of multiple episodes of AGN activity in the core of Abell 1795." Astronomy & Astrophysics 618 (October 2018): A152. http://dx.doi.org/10.1051/0004-6361/201833222.

Der volle Inhalt der Quelle

Annotation:

In this paper we analyze AGN activity signatures in the rich nearby galaxy cluster Abell 1795 aiming to confirm and characterize the long-term feedback history in the system. We combine radio observations at 610 and 235 MHz from the Giant Metrewave Radio Telescope (GMRT) with 3.4 Msec X-ray data from the Chandra Observatory. Extracting radial temperature profiles, as well as X-ray and radio surface brightness profiles in three directions showing major morphological disturbances, we highlight the signatures of activity in the system. For the first time we observe radio emission corresponding to

APA, Harvard, Vancouver, ISO und andere Zitierweisen

46

Wamsteker, W., and R. Vio. "Multiwavelength Experiments on AGN: Reverberation Experiments." Symposium - International Astronomical Union 159 (1994): 159–62. http://dx.doi.org/10.1017/s0074180900174959.

Der volle Inhalt der Quelle

Annotation:

The nature of the successful reverberation campaigns on variable active galaxies is summarized. A general summary of the completed campaigns is given. A discussion of the results of the first order (CCF) analysis is given and some comments are made on the directions needed to obtain more physcally meaningful solutions to the inversion problem presented by such observations of the sources of activity in the centers of active galaxies

APA, Harvard, Vancouver, ISO und andere Zitierweisen

47

Hickox, Ryan C., Stephanie M. LaMassa, John D. Silverman, and Alexander Kolodzig. "Host galaxies and large-scale structures of active galactic nuclei." Proceedings of the International Astronomical Union 11, A29B (2015): 113–23. http://dx.doi.org/10.1017/s1743921316004592.

Der volle Inhalt der Quelle

Annotation:

AbstractOur understanding of the cosmic evolution of supermassive black holes (SMBHs) has been revolutionized by the advent of large multiwavelength extragalactic surveys, which have enabled detailed statistical studies of the host galaxies and large-scale structures of active galactic nuclei (AGN). We give an overview of some recent results on SMBH evolution, including the connection between AGN activity and star formation in galaxies, the role of galaxy mergers in fueling AGN activity, the nature of luminous obscured AGN, and the connection between AGN and their host dark matter halos. We co

APA, Harvard, Vancouver, ISO und andere Zitierweisen

48

Rosito, M. S., S. E. Pedrosa, P. B. Tissera, et al. "The role of AGN feedback in the structure, kinematics, and evolution of ETGs in Horizon simulations." Astronomy & Astrophysics 652 (August 2021): A44. http://dx.doi.org/10.1051/0004-6361/202039976.

Der volle Inhalt der Quelle

Annotation:

Context. Feedback processes play a fundamental role in the regulation of the star formation (SF) activity in galaxies and, in particular, in the quenching of early-type galaxies (ETGs) as has been inferred by observational and numerical studies of Λ-CDM models. At z = 0, ETGs exhibit well-known fundamental scaling relations, but the connection between scaling relations and the physical processes shaping ETG evolution remains unknown. Aims. This work aims to study the impact of the energetic feedback due to active galactic nuclei (AGN) on the formation and evolution of ETGs. We focus on assessi

APA, Harvard, Vancouver, ISO und andere Zitierweisen

49

Sebastian, Biny, P. Kharb, C. P. O’Dea, J. F. Gallimore, and S. A. Baum. "A radio polarimetric study to disentangle AGN activity and star formation in Seyfert galaxies." Monthly Notices of the Royal Astronomical Society 499, no. 1 (2020): 334–54. http://dx.doi.org/10.1093/mnras/staa2473.

Der volle Inhalt der Quelle

Annotation:

ABSTRACT To understand the origin of radio emission in radio-quiet active galactic nucleus (AGN) and differentiate between the contributions from star formation, AGN accretion, and jets, we have observed a nearby sample of Seyfert galaxies along with a comparison sample of starburst galaxies using the Expanded Very Large Array (EVLA) in full-polarization mode in the B-array configuration. The radio morphologies of the Seyfert galaxies show lobe/bubble-like features or prominent cores in radio emission, whereas the starburst galaxies show radio emission spatially coincident with the star-formin

APA, Harvard, Vancouver, ISO und andere Zitierweisen

50

Vignali, Cristian. "Obscured accretion from AGN surveys." Proceedings of the International Astronomical Union 9, S304 (2013): 132–38. http://dx.doi.org/10.1017/s1743921314003548.

Der volle Inhalt der Quelle

Annotation:

AbstractRecent models of super-massive black hole (SMBH) and host galaxy joint evolution predict the presence of a key phase where accretion, traced by obscured Active Galactic Nuclei (AGN) emission, is coupled with powerful star formation. Then feedback processes likely self-regulate the SMBH growth and quench the star-formation activity. AGN in this important evolutionary phase have been revealed in the last decade via surveys at different wavelengths. On the one hand, moderate-to-deep X-ray surveys have allowed a systematic search for heavily obscured AGN, up to very high redshifts (z≈5). O

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Wir bieten Rabatte auf alle Premium-Pläne für Autoren, deren Werke in thematische Literatursammlungen aufgenommen wurden. Kontaktieren Sie uns, um einen einzigartigen Promo-Code zu erhalten!