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Herschel ATLAS: The cosmic star formation history of quasar host galaxies

Serjeant, S. and Blain, A. W. (2010) Herschel ATLAS: The cosmic star formation history of quasar host galaxies. Astronomy and Astrophysics, 518 . L7. ISSN 0004-6361.

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We present a derivation of the star formation rate per comoving volume of quasar host galaxies, derived from stacking analyses of far-infrared to mm-wave photometry of quasars with redshifts 0 < z < 6 and absolute I-band magnitudes -22 > I_(AB) > -32 We use the science demonstration observations of the first ~16 deg^2 from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) in which there are 240 quasars from the Sloan Digital Sky Survey (SDSS) and a further 171 from the 2dF-SDSS LRG and QSO (2SLAQ) survey. We supplement this data with a compilation of data from IRAS, ISO, Spitzer, SCUBA and MAMBO. H-ATLAS alone statistically detects the quasars in its survey area at >5σ at 250,350 and 500 μm. From the compilation as a whole we find striking evidence of downsizing in quasar host galaxy formation: low-luminosity quasars with absolute magnitudes in the range -22 > I_(AB) > -24 have a comoving star formation rate (derived from 100 μm rest-frame luminosities) peaking between redshifts of 1 and 2, while high-luminosity quasars with I_(AB) < -26 have a maximum contribution to the star formation density at z ~ 3. The volume-averaged star formation rate of -22 > I_(AB) > -24 quasars evolves as (1 + z)^(2.3±0.7) at z < 2, but the evolution at higher luminosities is much faster reaching (1 + z)^(10±1) at -26 > I_(AB) > -28. We tentatively interpret this as a combination of a declining major merger rate with time and gas consumption reducing fuel for both black hole accretion and star formation.

Item Type:Article
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URLURL TypeDescription
Serjeant, S.0000-0002-0517-7943
Blain, A. W.0000-0001-7489-5167
Additional Information:© 2010 ESO. Received 30 March 2010; Accepted 7 May 2010; Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia with important participation from NASA. We thank the anonymous referee for useful comments. This work was funded in part by STFC (grants PP/D002400/1 and ST/G002533/1). Funding for the SDSS and SDSS-II has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the NSF, the U.S. Department of Energy, NASA, the Japanese Monbukagakusho, the Max Planck Society, and HEFCE.
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)PP/D002400/1
Science and Technology Facilities Council (STFC)ST/G002533/1
Subject Keywords:galaxies: active; infrared: galaxies; quasars: general; galaxies: formation; submillimeter: galaxies; galaxies: starburst
Record Number:CaltechAUTHORS:20101201-100728896
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Official Citation:Herschel ATLAS: The cosmic star formation history of quasar host galaxies S. Serjeant, F. Bertoldi, A. W. Blain, D. L. Clements, A. Cooray, L. Danese, J. Dunlop, L. Dunne, S. Eales, J. Falder, E. Hatziminaoglou, D. H. Hughes, E. Ibar, M. J. Jarvis, A. Lawrence, M. G. Lee, M. Michałowski, M. Negrello, A. Omont, M. Page, C. Pearson, P. P. van der Werf, G. White, A. Amblard, R. Auld, M. Baes, D. G. Bonfield, D. Burgarella, S. Buttiglione, A. Cava, A. Dariush, G. de Zotti, S. Dye, D. Frayer, J. Fritz, J. Gonzalez-Nuevo, D. Herranz, R. J. Ivison, G. Lagache, L. Leeuw, M. Lopez-Caniego, S. Maddox, E. Pascale, M. Pohlen, E. Rigby, G. Rodighiero, S. Samui, B. Sibthorpe, D. J. B. Smith, P. Temi, M. Thompson, I. Valtchanov and A. Verma A&A 518 L7 (2010) DOI: 10.1051/0004-6361/201014565
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21088
Deposited By: Jason Perez
Deposited On:01 Dec 2010 21:27
Last Modified:09 Mar 2020 13:19

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