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The Spitzer Extragalactic Representative Volume Survey: The Environments of High-z SDSS Quasi-stellar Objects

Falder, J. T. and Stevens, J. A. and Jarvis, Matt J. and Bonfield, D. G. and Lacy, M. and Farrah, D. and Oliver, S. and Surace, J. and Mauduit, J.-C. and Vaccari, M. and Marchetti, L. and Gonzalez-Solares, E. and Afonso, J. and Cava, A. and Seymour, N. (2011) The Spitzer Extragalactic Representative Volume Survey: The Environments of High-z SDSS Quasi-stellar Objects. Astrophysical Journal, 735 (2). Art. No. 123. ISSN 0004-637X. http://resolver.caltech.edu/CaltechAUTHORS:20110711-113801387

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Abstract

This paper presents a study of the environments of SDSS quasi-stellar objects (QSOs) in the Spitzer Extragalactic Representative Volume Survey (SERVS). We concentrate on the high-redshift QSOs as these have not been studied in large numbers with data of this depth before. We use the IRAC 3.6-4.5 μm color of objects and ancillary r-band data to filter out as much foreground contamination as possible. This technique allows us to find a significant (>4σ) overdensity of galaxies around QSOs in a redshift bin centered on z ~ 2.0 and an (>2σ) overdensity of galaxies around QSOs in a redshift bin centered on z ~ 3.3. We compare our findings to the predictions of a semi-analytic galaxy formation model, based on the ΛCDM MILLENNIUM simulation, and find for both redshift bins that the model predictions match well the source density we have measured from the SERVS data.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-637X/735/2/123DOIArticle
http://iopscience.iop.org/0004-637X/735/2/123/PublisherArticle
ORCID:
AuthorORCID
Farrah, D.0000-0003-1748-2010
Oliver, S.0000-0001-7862-1032
Surace, J.0000-0001-7291-0087
Vaccari, M.0000-0002-6748-0577
Additional Information:© 2011 American Astronomical Society. Received 2010 November 29; accepted 2011 April 22; published 2011 June 24. We thank the anonymous referee for comments that improved the paper. This work is based (in part) on observations made with the Spitzer Space Telescope which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. J.T.F. thanks the Science and Technology Facilities Council for a research studentship. J.A. gratefully acknowledges the support from the Science and Technology Foundation (FCT, Portugal) through the research grant PTDC/FIS/100170/2008.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)PTDC/FIS/100170/2008
Subject Keywords:galaxies: clusters: general; galaxies: evolution; quasars: general
Classification Code:PACS: 95.80.+p; 98.54.Aj; 98.62.Ai; 98.62.Py
Record Number:CaltechAUTHORS:20110711-113801387
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110711-113801387
Official Citation:The Spitzer Extragalactic Representative Volume Survey: The Environments of High-z SDSS Quasi-stellar Objects J. T. Falder et al. 2011 ApJ 735 123
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24362
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:11 Jul 2011 20:18
Last Modified:09 Jul 2019 21:56

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