The Spitzer Extragalactic Representative Volume Survey (SERVS): The Environments of High-z SDSS Quasi-Stellar-Objects
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{\mu}m colour of objects and ancillary r-band data to filter out as much foreground contamination as possible. This technique allows us to find a significant (> 4-{\sigma}) over-density of galaxies around QSOs in a redshift bin centred on z ~ 2.0 and a (> 2-{\sigma}) over-density of galaxies around QSOs in a redshift bin centred on z ~ 3.3. We compare our findings to the predictions of a semi-analytic galaxy formation model, based on the {\Lambda}CDM millennium simulation, and find for both redshift bins that the model predictions match well the source-density we have measured from the SERVS data.
Keywords
Cite
@article{arxiv.1105.0586,
title = {The Spitzer Extragalactic Representative Volume Survey (SERVS): The Environments of High-z SDSS Quasi-Stellar-Objects},
author = {J. T. Falder and J. A. Stevens and Matt J. Jarvis and D. G. Bonfield and M. Lacy and D. Farrah and S. Oliver and J. Surace and J. -C. Mauduit and M. Vaccari and L. Marchetti and E. González-Solares and J. Afonso and A. Cava and N. Seymour},
journal= {arXiv preprint arXiv:1105.0586},
year = {2015}
}
Comments
13 pages, 12 figures, Accepted by ApJ