Results 51 to 60 of about 31,213 (262)

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

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

CEERS Key Paper. II. A First Look at the Resolved Host Properties of AGN at 3 < z < 5 with JWST

The Astrophysical Journal Letters, 2023
We report on the host properties of five X-ray-luminous active galactic nuclei (AGN) identified at 3 < z < 5 in the first epoch of imaging from the Cosmic Evolution Early Release Science Survey.
Dale D. Kocevski, Guillermo Barro, Elizabeth J. McGrath, Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson, Shardha Jogee, Guang Yang, Mark Dickinson, Nimish P. Hathi, Bren E. Backhaus, Eric F. Bell, Laura Bisigello, Véronique Buat, Denis Burgarella, Caitlin M. Casey, Nikko J. Cleri, M. C. Cooper, Luca Costantin, Darren Croton, Emanuele Daddi, Adriano Fontana, Seiji Fujimoto, Jonathan P. Gardner, Eric Gawiser, Mauro Giavalisco, Andrea Grazian, Norman A. Grogin, Yuchen Guo, Pablo Arrabal Haro, Michaela Hirschmann, Benne W. Holwerda, Marc Huertas-Company, Taylor A. Hutchison, Kartheik G. Iyer, Brenda Jones, Stéphanie Juneau, Jeyhan S. Kartaltepe, Lisa J. Kewley, Allison Kirkpatrick, Anton M. Koekemoer, Peter Kurczynski, Aurélien Le Bail, Arianna S. Long, Jennifer M. Lotz, Ray A. Lucas, Casey Papovich, Laura Pentericci, Pablo G. Pérez-González, Nor Pirzkal, Marc Rafelski, Swara Ravindranath, Rachel S. Somerville, Amber N. Straughn, Sandro Tacchella, Jonathan R. Trump, Stephen M. Wilkins, Stijn Wuyts, L. Y. Aaron Yung, Jorge A. Zavala   +59 more
doaj   +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

Active Galactic Nuclei in the Green Valley at z ∼ 0.7

The Astrophysical Journal
We present near-infrared (NIR) spectroscopy using the MMT and Magellan infrared spectrograph for a sample of 29 massive galaxies ( $\mathrm{log}\ {M}_{* }/{M}_{\odot }\gtrsim 10$ ) at z ∼ 0.7 with optical spectroscopy from the Large Early Galaxy ...
Charity Woodrum, Christina C. Williams, Marcia Rieke, Kevin N. Hainline, Raphael E. Hviding, Zhiyuan Ji, Robert Kennicutt, Christopher N. A. Willmer   +7 more
doaj   +1 more source

Image decomposition of barred galaxies and AGN hosts [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
I present the results of multi-component decomposition of V and R broadband images of a sample of 17 nearby galaxies, most of them hosting bars and active galactic nuclei. I use BUDDA v2.1 to produce the fits, allowing to include bars and AGN in the models. A comparison with previous results from the literature shows a fairly good agreement.
openaire   +2 more sources

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

PRIMUS: The relationship between Star formation and AGN accretion

, 2015
We study the evidence for a connection between active galactic nuclei (AGN) fueling and star formation by investigating the relationship between the X-ray luminosities of AGN and the star formation rates (SFRs) of their host galaxies.
Aird, James, Azadi, Mojegan, Blanton, Michael, Coil, Alison, Cool, Richard, Eisenstein, Daniel, Mendez, Alexander, Moustakas, John, Wong, Kenneth, Zhu, Guangtun   +9 more
core   +2 more sources

The Incidence of Active Galactic Nuclei in Pure Disk Galaxies: The Spitzer View [PDF]

, 2009
We have conducted a high-resolution spectroscopic study using Spitzer of 18 bulgeless (Sd/Sdm) galaxies that show no definitive signatures of nuclear activity in their optical spectra. This is the first systematic mid-IR search for weak or hidden AGNs in
Abel, N. P., Boeker, T., Gliozzi, M., Heckman, T., Mcalpine, W., Satyapal, S.   +5 more
core   +1 more source

Different Dependence of Narrow Hα Line Luminosity on Optical Continuum Luminosity between Star-forming Galaxies and Type 2 Active Galactic Nuclei: Globally Negative AGN Feedback in Local Type 2 AGN?

The Astrophysical Journal
In this manuscript, clues are provided to support globally negative active galactic nuclei (AGN) feedback on star formation in the host galaxies of the local low-redshift Sloan Digital Sky Survey (SDSS) Type 2 AGN, based on the different dependence of ...
XueGuang Zhang
doaj   +1 more source