The role of AGN in the colour transformation of galaxies at redshifts z ≈ 1

Authors :: Alison L. Coil
Antonis Georgakakis
Michael C. Cooper
Jeffrey A. Newman
Joel R. Primack
Renbin Yan
C. M. Pierce
Elise S. Laird
Jennifer M. Lotz
Kirpal Nandra
Pauline Barmby
David C. Koo
Steven P. Willner
Source :: Monthly Notices of the Royal Astronomical Society. 385:2049-2060
Publication Year :: 2008
Publisher :: Oxford University Press (OUP), 2008.
Abstract: We explore the role of AGN in establishing and/or maintaining the bimodal colour distribution of galaxies by quenching their star-formation and hence, causing their transition from the blue to the red cloud. Important tests for this scenario include (i) the X-ray properties of galaxies in the transition zone between the two clouds and (ii) the incidence of AGN in post-starbursts, i.e. systems observed shortly after (<br />Comment: Accepted for publication in MNRAS