Results 91 to 100 of about 189,366 (258)

Comparing the host galaxy ages of X-ray selected AGN in COSMOS

Astronomy & Astrophysics, 2023
We explore the properties of the host galaxies of X-ray selected AGN in the COSMOS field using the Chandra Legacy sample and the LEGA-C survey VLT optical spectra. Our main goal is to compare the relative ages of the host galaxies of the obscured and unobscured AGN by means of the calcium break Dn(4000) and the Hδ Balmer line.
Georgantopoulos, I., Pouliasis, E., Mountrichas, G., Van der Wel, A., Marchesi, S., Lanzuisi, G.   +5 more
openaire   +4 more sources

Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared

The Astrophysical Journal
Effectively finding and identifying active galactic nuclei (AGNs) in dwarf galaxies is an important step in studying black hole formation and evolution.
Megan R. Sturm, Bayli Hayes, Amy E. Reines   +2 more
doaj   +1 more source

Towards a Complete Census of AGNs in Nearby Galaxies: A Large Population of Optically Unidentified AGNs [PDF]

, 2009
Using Spitzer-IRS spectroscopy, we investigate the ubiquity of Active Galactic Nuclei (AGN) in a complete (~94%), volume-limited sample of the most bolometrically-luminous galaxies (L_IR > (0.3-20) x 10^10 L_sun) to D < 15 Mpc. Our analyses are based on the detection of the high-excitation emission line [NeV](\lambda 14.32 um; 97.1 eV) to unambiguously
arxiv   +1 more source

The Effects of an AGN on Host Galaxy Colour and Morphology Measurements

, 2010
We assess the effects of simulated active galactic nuclei (AGNs) on the colour and morphology measurements of their host galaxies. To test the morphology measurements, we select a sample of galaxies not known to host AGNs and add a series of point ...
A. L. Coil, A. M. Koekemoer, Abraham, Barden, Bell, Bennert, Bertin, Blanton, C. J. Conselice, C. M. Pierce, Ciotti, Coil, Conselice, Conselice, Conselice, Croton, D. C. Koo, D. J. V. Rosario, Davis, de Bruyn, E. S. Laird, Francis, Gabor, Georgakakis, Gini, Griffith, Grogin, Grogin, Hopkins, Hopkins, Hopkins, Hopkins, Häussler, Ivison, J. M. Lotz, J. R. Primack, Kauffmann, Kauffmann, Kennicutt, Kennicutt, Kim, Kinney, Laird, Lotz, Lotz, Lotz, Nandra, Peng, Petrosian, Pierce, Pierce, R. J. Ivison, R. L. Griffith, R. Yan, S. M. Faber, S. Salim, Schawinski, Silverman, Simmons, Somerville, Sánchez, Trujillo, Urrutia, Weiner, Willmer, Wyder   +65 more
core   +1 more source

Structure and morphology of X-ray selected AGN hosts at 1 [PDF]

, 2014
We analyze morphologies of the host galaxies of 35 X-ray selected active galactic nucleus (AGNs) at $z\sim2$ in the Cosmic Evolution Survey (COSMOS) field using Hubble Space Telescope/WFC3 imaging taken from the Cosmic Assembly Near-infrared Deep ...
Chen, Yang, Fan, Lulu, Fang, Guanwen, Knudsen, Kirsten Kraiberg, Kong, Xu, Li, Jinrong, Lv, Xuanyi   +6 more
core   +2 more sources

Agn & Host Galaxy Scaling Relations

, 2018
IBISCO is a new multi-dimensional study of AGN scaling relations in a complete unbiased sample of local AGN, carried-on with IRAM, ALMA and INTEGRAL. For the first time we have included the information on the molecular gas reservoirs into the scaling relations between AGN and host galaxy properties.
Feruglio, Chiara, D'Odorico, V., Fiore, F., Cristiani, S., Pallottini, A., Gallerani, S., Ferrara, A., Carniani, S., Piconcelli, E., Bischetti, M., Malizia, A., Molina, M., Marconi, A., Maiolino, R., et al.   +14 more
openaire   +2 more sources

AGN-host galaxy connection: multiwavelength study [PDF]

Proceedings of the International Astronomical Union, 2012
AbstractThe connection between active galactic nuclei (AGN) and their hosts showed to be important for understanding the formation and evolution of active galaxies. Using X–ray and deep optical data, we study how morphology and colours are related to X–ray properties at redshifts z≤2.0 for a sample of > 300 X–ray detected AGN in the Subaru/XMM ...
Otelo Team, M. Sánchez-Portal, A. M. Pérez García, Ángel Bongiovanni, J. Cepa, Mirjana Pović   +5 more
openaire   +2 more sources

On the Host Galaxy of GRB 150101B and the Associated Active Galactic Nucleus [PDF]

, 2016
We present a multi-wavelength analysis of the host galaxy of short-duration gamma-ray burst (GRB) 150101B. Follow-up optical and X-ray observations suggested that the host galaxy, 2MASX J12320498-1056010, likely harbors a low-luminosity active galactic nuclei (AGN).
arxiv   +1 more source

HST WFC3/IR Observations of Active Galactic Nucleus Host Galaxies at z~2: Supermassive Black Holes Grow in Disk Galaxies

, 2010
We present the rest-frame optical morphologies of active galactic nucleus (AGN) host galaxies at 1 ...
Bond, Cardamone, Cardamone, Constantin, Ferrarese, Francke, Gebhardt, Hinshaw, Hopkins, Hopkins, Häring, Jahnke, Koekemoer, Koekemoer, Koss, Kriek, Luo, Merloni, Peng, Peng, Schawinski, Schawinski, Schawinski, Sersic, Simmons, Treister, Treister, Trump, Ueda, Windhorst   +29 more
core   +1 more source

The Morphology of Dwarf Galaxies Hosting Variable Active Galactic Nuclei

The Astrophysical Journal
We analyze Hubble Space Telescope optical imaging of eight low-mass galaxies hosting active galactic nuclei (AGN) identified via their photometric variability in V. F. Baldassare et al.
Erin Kimbro, Vivienne Baldassare, Guy Worthey, Marla Geha, Jenny Greene   +4 more
doaj   +1 more source