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 González-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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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.
|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.|
|Subject Keywords:||galaxies: clusters: general; galaxies: evolution; quasars: general|
|Classification Code:||PACS: 95.80.+p; 98.54.Aj; 98.62.Ai; 98.62.Py|
|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.|
|Deposited By:||Jason Perez|
|Deposited On:||11 Jul 2011 20:18|
|Last Modified:||26 Dec 2012 13:23|
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