Results 101 to 110 of about 64,814 (288)

The dust masses of powerful radio galaxies: clues to the triggering of their activity [PDF]

, 2014
We use deep Herschel Space Observatory observations of a 90% complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 < z < 0.7) to estimate the dust masses of their host galaxies and thereby investigate the triggering mechanisms for their ...
Almeida, C., Dicken, D., Könyves, V., Morganti, R., Nesvadba, N., Ramos Almeida, C., Tadhunter, C., Ysard, N.   +7 more
core   +3 more sources

AGN-host connection at 0.5 [PDF]

, 2016
We explore the dependence of the incidence of moderate-luminosity (L 0.5−8 keV = 1041.9−43.7 erg s-1 ) active galactic nuclei (AGNs) and the distribution of their accretion rates on host color at 0.5 ∗ > 1010 M ⊙ .
Tao Wang, Tao Wang, D. Elbaz, D. Alexander, Yongquan Xue, J. Gabor, S. Juneau, C. Schreiber, C. Schreiber, Xianzhong Zheng, S. Wuyts, Yong Shi, E. Daddi, X. Shu, Guanwen Fang, J.-S. Huang, J.-S. Huang, B. Luo, Q. Gu   +18 more
semanticscholar   +1 more source

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-formation in the host galaxies of radio-AGN [PDF]

Proceedings of Nuclei of Seyfert galaxies and QSOs - Central engine & conditions of star formation — PoS(Seyfert 2012), 2013
There exist strong evidence supporting the co-evolution of central supermassive black holes and their host galaxies. It is however still unclear what the exact role of nuclear activity, in the form of accretion onto these supermassive black holes, in this co-evolution is.
Karouzos, Marios, Trichas, Markos, Im, Myungshin, Malkan, Matthew, team, the AKARI-NEP   +4 more
openaire   +4 more sources

Morphologies of Radio, X-Ray, and Mid-Infrared Selected AGN

, 2010
We investigate the optical morphologies of candidate active galaxies identified at radio, X-ray, and mid-infrared wavelengths. We use the Advanced Camera for Surveys General Catalog (ACS-GC) to identify 372, 1360, and 1238 AGN host galaxies from the VLA,
Alonso-Herrero, Ashby, Barth, Civano, Comerford, Comerford, Courbin, Daniel Stern, Donley, Donley, Eckart, Eckart, Eisenhardt, Faure, Fazio, Ferrarese, Gabor, Gebhardt, Gerke, Giavalisco, Hasinger, Hickox, Hopkins, Häussler, Koekemoer, Kollmeier, Komossa, Kormendy, Kormendy, Lacy, Magorrian, Marconi, Peng, Pentericci, Rieke, Roger L. Griffith, Sanders, Schechter, Schinnerer, Schneider, Scoville, Stern, Stern, Sérsic, Xu, York, Young   +46 more
core   +1 more source

The black holes of radio galaxies during the "Quasar Era": Masses, accretion rates, and evolutionary stage [PDF]

, 2010
We present an analysis of the AGN broad-line regions of 6 powerful radio galaxies at z>~2 (HzRGs) with rest-frame optical imaging spectroscopy obtained at the VLT. All galaxies have luminous (L(H-alpha)=few x 10^44 erg s^-1), spatially unresolved H-alpha
Best, Philip N., Binette, Luc, De Breuck, Carlos, Lehnert, Matt D., Nesvadba, Nicole P. H., Proga, Daniel   +5 more
core   +1 more source

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

Properties of Galaxies Hosting X-ray Selected Active Galactic Nuclei in the Cl1604 Supercluster at z=0.9 [PDF]

, 2008
To investigate the role of feedback from Active Galactic Nuclei (AGN) in driving the evolution of their host galaxies, we have carried out a study of the environments and optical properties of galaxies harboring X-ray luminous AGN in the Cl1604 ...
Abraham, Baldry, Barger, Barger, Bauer, Bennert, Brian C. Lemaux, Canalizo, Cappi, Christopher D. Fassnacht, Cid Fernandes, Dale D. Kocevski, De Robertis, de Vaucouleurs, Eastman, Faber, Faber, Fisher, Gal, Gal, Gal, Garmire, Gebhardt, Georgakakis, Gerke, Gilli, González Delgado, Gordon K. Squires, Grogin, Grogin, Gómez, Heckman, Henry, Ho, Hopkins, Hopkins, Kartaltepe, Kocevski, Koekemoer, Lin, Lisker, Lori M. Lubin, Lotz, Lubin, Mainieri, Marshall, Martin, Martini, Menanteau, Monet, Nandra, Oke, Peng, Pierce, Poggianti, Poggianti, Postman, Postman, Robin Lin, Roy R. Gal, Ruderman, Sersic, Silverman, Silverman, Smail, Smith, Sutherland, Sánchez, Tremaine, Treu, Westoby, Yan   +71 more
core   +2 more sources

The abundances and properties of Dual AGN and their host galaxies in the EAGLE simulations [PDF]

Monthly notices of the Royal Astronomical Society, 2018
We look into the abundance of Dual AGN (active galactic nucleus) in the largest hydrodynamical simulation from the Evolution and Assembly of GaLaxies and their Environment (EAGLE) project.
Y. Rosas-Guevara, R. Bower, S. McAlpine, S. Bonoli, P. Tissera   +4 more
semanticscholar   +1 more source

Study of AGN contribution on morphological parameters of their host galaxies [PDF]

Proceedings of the International Astronomical Union, 2019
AbstractWe tested how the AGN contribution (5%–75% of the total flux) may affect different morphological parameters commonly used in galaxy classification. We carried out all analysis at z ∼ 0 and at higher redshifts that correspond to the COSMOS field.
Getachew-Woreta, Tilahun, Pović, Mirjana, Masegosa, Josefa, Perea, Jaime, Beyoro Amado, Zeleke, Márquez, Isabel   +5 more
openaire   +5 more sources