Results 41 to 50 of about 31,576 (269)

AGN in dusty hosts: implications for galaxy evolution [PDF]

Monthly Notices of the Royal Astronomical Society, 2013
We present strong empirical evidence for a physical connection between the occurrence of a starburst (SB) and a luminous AGN phase. Drawing infrared (IR), X-ray, and optically selected samples from COSMOS, we find that the locus of type-2 AGN hosts in the optical colour-magnitude (U-V/V) and colour-colour (U-V/V-J) space significantly overlaps with ...
Symeonidis, M., Kartaltepe, J., Salvato, M., Bongiorno, A., Brusa, M., Page, M. J., Ilbert, O., Sanders, D., Wel, A.   +8 more
openaire   +6 more sources

Mid-infrared Outbursts in Nearby Galaxies: Nuclear Obscuration and Connections to Hidden Tidal Disruption Events and Changing-look Active Galactic Nuclei

The Astrophysical Journal Letters, 2023
We study the properties of galaxies hosting mid-infrared outbursts in the context of a catalog of 500,000 galaxies from the Sloan Digital Sky Survey. We find that nuclear obscuration, as inferred by the surrounding dust mass, does not correlate with host
Sierra A. Dodd, Arya Nukala, Isabelle Connor, Katie Auchettl, K. D. French, Jamie A. P. Law-Smith, Erica Hammerstein, Enrico Ramirez-Ruiz   +7 more
doaj   +1 more source

Host galaxies of AGN

, 2001
The relationship of an AGN to its host galaxy is a crucial question in the study of galaxy evolution. We perform stellar population synthesis in the central regions of galaxies of different activity levels. A large number of stellar features are measured both in the optical and near-infrared.
Boisson, C., Joly, M.
openaire   +3 more sources

AGN host galaxy mass function in COSMOS [PDF]

Astronomy & Astrophysics, 2016
15 pages, 10 figures, accepted for publication in A& ...
Bongiorno, A, Schulze, A., Merloni, A., Zamorani, G., Ilbert, O., La Franca, F., Peng, Y., Piconcelli, E., Mainieri, V., Silverman, J. D., BRUSA, MARCELLA, Fiore, F., Salvato, M., Scoville, N.   +13 more
openaire   +5 more sources

Looking for Signatures of AGN Feedback in Radio-Quiet AGN

Galaxies, 2023
In this article, we discuss the state of “AGN feedback” in radio-quiet (RQ) AGN. This study involves heterogeneous samples of nearby Seyfert and LINER galaxies as well as quasi-stellar objects (QSOs) that have been observed at low radio frequencies (few ∼
Preeti Kharb, Sasikumar Silpa
doaj   +1 more source

Do Bars Trigger Activity in Galactic Nuclei?

, 2012
We investigate the connection between the presence of bars and AGN activity, using a volume-limited sample of $\sim$9,000 late-type galaxies with axis ratio $b/a>0.6$ and $M_{r} < -19.5+5{\rm log}h$ at low redshift ($0.02\le z\lesssim 0.055$), selected ...
Hwang, Ho Seong, Lee, Gwang-Ho, Lee, Jong Chul, Lee, Jong Hwan, Lee, Myung Gyoon, Sohn, Jubee, Woo, Jong-Hak   +6 more
core   +1 more source

Spectral Decomposition of Broad-Line AGNs and Host Galaxies

, 2005
Using an eigenspectrum decomposition technique, we separate the host galaxy from the broad line active galactic nucleus (AGN) in a set of 4666 spectra from the Sloan Digital Sky Survey (SDSS), from redshifts near zero up to about 0.75.
Berk, Daniel E. Vanden, Brinkmann, John, Burton, Ross E., Connolly, Andrew J., Hall, Patrick B., Jester, Sebastian, Schneider, Donald P., Shen, Jiajian, Szalay, Alex S., Yip, Ching-Wa   +9 more
core   +1 more source

Low-luminosity AGN and Normal Galaxies [PDF]

, 2000
Low-luminosity AGN (with X-ray luminosity < 1e42 ergs/s) far outnumber ordinary AGN, and are therefore perhaps more relevant to our understanding of AGN phenomena and the relationship between AGN and host galaxies.
Ptak, A.
core   +3 more sources

Host galaxy colour gradients and accretion disc obscuration in AEGIS z~1 X-ray-selected active galactic nuclei

, 2010
We describe the effect of AGN light on host galaxy optical and UV-optical colours, as determined from X-ray-selected AGN host galaxies at z~1, and compare the AGN host galaxy colours to those of a control sample matched to the AGN sample in both redshift
A. L. Coil, Aird, Baldry, Baldwin, Barger, Barger, Barmby, Bell, Bell, Bell, Bower, Bruzual, Bundy, Bundy, C. M. Pierce, C. N. A. Willmer, Cattaneo, Ciliegi, Ciotti, Coil, Condon, Conselice, Croton, D. J. V. Rosario, Davis, Davis, Dekel, Donley, Drake, E. S. Laird, Faber, Fang, Fasano, Gehrels, Georgakakis, Georgakakis, Georgakakis, Georgakakis, Georgakakis, Gerke, Granato, Grogin, Grogin, Hatziminaoglou, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Huang, Ivison, J. M. Lotz, J. R. Primack, Jeltema, K. Bundy, Kassin, Kauffmann, Kauffmann, Kennicutt, Kinney, Konidaris, Koo, Lacy, Laird, Laird, Le Floc'h, Lin, Martin, Martin, Moustakas, Nandra, Nandra, Nandra, Noeske, Noeske, Park, Peterson, Pierce, Pierce, Rigby, Rovilos, S. M. Faber, S. Salim, Salim, Salim, Salim, Sato, Scannapieco, Schawinski, Schiminovich, Silk, Silverman, Silverman, Stern, Symeonidis, Sánchez, Teng, Weiner, Weiner, Willmer, Wilson, Wyder, Yan   +102 more
core   +1 more source

Typical AGN at intermediate redshifts

, 2008
We study the host galaxies and black holes of typical X-ray selected AGN at intermediate redshifts (z~0.5-1.4). The AGN are selected such that their spectral energy distributions are dominated by stellar emission, i.e., they show a prominent 1.6micron ...
Almudena Alonso-Herrero, Archan S. Majumdar, Sandip K. Chakrabarti   +2 more
core   +1 more source