The host galaxies of X-ray selected active galactic nuclei to z = 2.5 : structure, star formation, and their relationships from CANDELS and Herschel/PACS
MetadataShow full item record
We study the relationship between the structure and star formation rate (SFR) of X-ray selected low and moderate luminosity active galactic nuclei (AGNs) in the two Chandra Deep Fields, using Hubble Space Telescope imaging from the Cosmic Assembly Near Infrared Extragalactic Legacy Survey (CANDELS) and deep far-infrared maps from the PEP+GOODS-Herschel survey. We derive detailed distributions of structural parameters and FIR luminosities from carefully constructed control samples of galaxies, which we then compare to those of the AGNs. At z ~ 1, AGNs show slightly diskier light profiles than massive inactive (non-AGN) galaxies, as well as modestly higher levels of gross galaxy disturbance (as measured by visual signatures of interactions and clumpy structure). In contrast, at z ~ 2, AGNs show similar levels of galaxy disturbance as inactive galaxies, but display a red central light enhancement, which may arise from a more pronounced bulge in AGN hosts or extinguished nuclear light. We undertake a number of tests of both these alternatives, but our results do not strongly favor one interpretation over the other. The mean SFR and its distribution among AGNs and inactive galaxies are similar at z> 1.5. At z<1, however, clear and significant enhancements are seen in the SFRs of AGNs with bulge-dominated light profiles. These trends suggest an evolution in the relation between nuclear activity and host properties with redshift, towards a minor role for mergers and interactions at z> 1.5.
Rosario , D J , McIntosh , D H , Van Der Wel , A , Kartaltepe , J , Lang , P , Santini , P , Wuyts , S , Lutz , D , Rafelski , M , Villforth , C , Alexander , D M , Bauer , F E , Bell , E F , Berta , S , Brandt , W N , Conselice , C J , Dekel , A , Faber , S M , Ferguson , H C , Genzel , R , Grogin , N A , Kocevski , D D , Koekemoer , A M , Koo , D C , Lotz , J M , Magnelli , B , Maiolino , R , Mozena , M , Mullaney , J R , Papovich , C J , Popesso , P , Tacconi , L J , Trump , J R , Avadhuta , S , Bassett , R , Bell , A , Bernyk , M , Bournaud , F , Cassata , P , Cheung , E , Croton , D , Donley , J , Degroot , L , Guedes , J , Hathi , N , Herrington , J , Hilton , M , Lai , K , Lani , C , Martig , M , McGrath , E , Mutch , S , Mortlock , A , McPartland , C , O'Leary , E , Peth , M , Pillepich , A , Poole , G , Snyder , D , Straughn , A , Telford , O , Tonini , C & Wandro , P 2015 , ' The host galaxies of X-ray selected active galactic nuclei to z = 2.5 : structure, star formation, and their relationships from CANDELS and Herschel/PACS ' Astronomy & Astrophysics , vol 573 , A85 . DOI: 10.1051/0004-6361/201423782
Astronomy & Astrophysics
Reproduced with permission from Astronomy & Astrophysics, © ESO 2014
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Showing items related by title, author, creator and subject.
Mendez Abreu, Jairo; Debattista, V. P.; Corsini, E. M.; Aguerri, J. A. L. (2014-12) - Journal articleContext. Historically, galaxy bulges were thought to be single-component objects at the center of galaxies. However, this picture is now questioned since different bulge types with different formation paths, namely classical ...
Galaxy And Mass Assembly (GAMA) : the wavelength-dependent sizes and profiles of galaxies revealed by MegaMorph Vulcani, Benedetta; Bamford, Steven P.; Haeussler, Boris; Vika, Marina; Rojas, Alex; Agius, Nicola K.; Baldry, Ivan; Bauer, Amanda E.; Brown, Michael J. I.; Driver, Simon; Graham, Alister W.; Kelvin, Lee S.; Liske, Jochen; Loveday, Jon; Popescu, Cristina C.; Robotham, Aaron S. G.; Tuffs, Richard J. (2014-06) - Journal articleWe investigate the relationship between colour and structure within galaxies using a large, volume-limited sample of bright, low-redshift galaxies with optical-near-infrared imaging from the Galaxy And Mass Assembly survey. ...
The UV continua and inferred stellar populations of galaxies at z ≃ 7-9 revealed by the Hubble Ultra-Deep Field 2012 campaign Dunlop, J. S.; Rogers, A. B.; McLure, R. J.; Ellis, R. S.; Robertson, B. E.; Koekemoer, A.; Dayal, P.; Curtis-Lake, E.; Wild, Vivienne; Charlot, S.; Bowler, R. A. A.; Schenker, M. A.; Ouchi, M.; Ono, Y.; Cirasuolo, M.; Furlanetto, S. R.; Stark, D. P.; Targett, T. A.; Schneider, E. (2013-07-11) - Journal articleWe use the new ultra-deep, near-infrared imaging of the Hubble Ultra-Deep Field (HUDF) provided by our UDF12 Hubble Space Telescope (HST) Wide Field Camera 3/IR campaign to explore the rest-frame ultraviolet (UV) properties ...