QUASAR-GALAXY CLUSTERING THROUGH PROJECTED GALAXY COUNTS AT z = 0.6-1.2

We investigate the spatial clustering of galaxies around quasars at z = 0.6-1.2 using photometric data from Sloan Digital Sky Survey Stripe 82. The quasar and galaxy cross-correlation functions are measured through the projected galaxy number density n(r sub(p)) on scales of 0.05 < r sub(p) <...

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Published inThe Astrophysical journal Vol. 773; no. 2; pp. 1 - 13
Main Authors Zhang, Shaohua, Wang, Tinggui, Wang, Huiyuan, Zhou, Hongyan
Format Journal Article
LanguageEnglish
Published United States 20.08.2013
Subjects
Amplitudes
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLACK HOLES
Clustering
COLOR
CORRELATION FUNCTIONS
Counting
DENSITY
GALAXIES
GALAXY CLUSTERS
LUMINOSITY
Photometry
QUASARS
RED SHIFT
SIGNALS
SKY
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Summary:We investigate the spatial clustering of galaxies around quasars at z = 0.6-1.2 using photometric data from Sloan Digital Sky Survey Stripe 82. The quasar and galaxy cross-correlation functions are measured through the projected galaxy number density n(r sub(p)) on scales of 0.05 < r sub(p) < 20 h super(-1) Mpc around quasars for a sample of 2300 quasars from Schneider et al. We detect strong clustering signals at all redshifts and find that the clustering amplitude increases significantly with redshift. We examine the dependence of quasar-galaxy clustering on quasar and galaxy properties and find that the clustering amplitude is significantly larger for quasars with more massive black holes or with bluer colors, while there is no dependence on quasar luminosity. We also show that quasars have a stronger correlation amplitude with blue galaxies than with red galaxies. We finally discuss the implications of our findings.
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ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/773/2/175