2011/05/03 by J. T. Falder, J. A. Stevens, Matt J. Jarvis +16
Physics and Astronomy · #Algorithm #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Bin #Computer science #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Gamma-ray bursts and supernovae #Physics #QSOS #Redshift #Redshift survey #astro-ph.CO
paper · pdf · doi:10.1088/0004-637x/735/2/123
13 pages, 12 figures, Accepted by ApJ
arxiv created 2011/05/03 · openalex publication_date 2011/06/24 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.