1. AGN-host connection at 0.5 < z < 2.5: A rapid evolution of AGN fraction in red galaxies during the last 10 Gyr
- Author
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Corentin Schreiber, Birong Luo, Xiu-Deng Zheng, Yong Shi, Stijn Wuyts, Tao Wang, Qiu-Sheng Gu, Yongquan Xue, Jared M. Gabor, J.-S. Huang, Xinwen Shu, David M. Alexander, E. Daddi, Guanwen Fang, Stéphanie Juneau, David Elbaz, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Nanjing University (NJU), Durham University, CAS Key Laboratory for Researches in Galaxies and Cosmology, University of Science and Technology of China [Hefei] (USTC), Leiden Observatory [Leiden], Universiteit Leiden [Leiden], Purple Mountain Observatory, University of Bath [Bath], Anhui Normal University, Dali University, National Astronomical Observatories of China, European Project: 312725,EC:FP7:SPA,FP7-SPACE-2012-1,ASTRODEEP(2013), Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Universiteit Leiden
- Subjects
Astrophysics::High Energy Astrophysical Phenomena ,Population ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Lambda ,star formation [Galaxies] ,01 natural sciences ,Power law ,high-redshift [Galaxies] ,galaxies: high-redshift ,0103 physical sciences ,10. No inequality ,education ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Physics ,Supermassive black hole ,education.field_of_study ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,evolution [Galaxies] ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Accretion (astrophysics) ,Galaxy ,Space and Planetary Science ,nuclei [Galaxies] ,galaxies: star formation ,galaxies: nuclei ,galaxies: evolution ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
We explore the dependence of the incidence of moderate-luminosity ($L_{X} = 10^{41.9-43.7}$ erg s$^{-1}$) AGNs and the distribution of their accretion rates on host color at 0.5 < z < 2.5, using deep X-ray data in GOODS fields. We use extinction-corrected rest-frame U-V colors to divide both AGN hosts and non-AGN galaxies into red sequence (quiescent), green valley (transition), and blue cloud (star-forming) populations. We find that both the AGN fraction at fixed stellar mass and its evolution with redshift are dependent on host colors. Most notably, red galaxies have the lowest AGN fraction (~5\%) at z~1 yet with most rapid redshift evolution, increasing by a factor of 5 (~24\%) at z~2. Green galaxies exhibit the highest AGN fraction across all redshifts, which is most pronounced at z~2 with more than half of them hosting an AGN at $M_{*} > 10^{10.6} M_{\odot}$. Together with the high AGN fraction in red galaxies at z~2, this indicates that X-ray AGNs could be important in both transforming blue galaxies into red ones and subsequently maintaining their quiescence at high redshift. Furthermore, consistent with low-redshift studies, we find that the probability of hosting an AGN in the total galaxy population can be characterized by a universal Eddington ratio ($p(\lambda_{Edd}) \sim \lambda_{Edd}^{-0.4}$) and a moderate redshift evolution. Yet consistent with their different AGN fractions, different populations appear to also have different $p(\lambda_{Edd})$ with red galaxies exhibiting more rapid redshift evolution than green and blue ones. Evidence for a steeper power law of $p(\lambda_{Edd})$ in red galaxies is also presented, though larger samples are needed to confirm. These results suggest that the AGN accretion or the growth of supermassive black holes is related to their host properties, and may also influence their hosts in a different mode dependent on the host color., Comment: A&A, in press
- Published
- 2017