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Journal article
The Clustering of High-redshift (2.9 <= z <= 5.1) Quasars in SDSS Stripe 82
The Astrophysical journal, v 859(1)
20 May 2018
Abstract
We present a measurement of the two-point autocorrelation function of photometrically selected high-z quasars over similar to 100 deg(2) on the Sloan Digital Sky Survey Stripe 82 field. Selection is performed using three machine-learning algorithms in a six-dimensional optical/mid-infrared color space. Optical data from the Sloan Digital Sky Survey are combined with overlapping deep mid-infrared data from the Spitzer IRAC Equatorial Survey and the Spitzer-HETDEX Exploratory Large-Area survey. Our selection algorithms are trained on the colors of known high-z quasars. The selected quasar sample consists of 1378 objects and contains both spectroscopically confirmed quasars and photometrically selected quasar candidates. These objects span a redshift range of 2.9 <= z <= 5.1 and are generally fainter than i = 20.2, a regime that has lacked sufficient number density to perform autocorrelation function measurements of photometrically classified quasars. We compute the angular correlation function of these data, marginally detecting quasar clustering. We fit a single power law with an index of delta = 1.39 +/- 0.618 and amplitude of theta(0) = 0'.71 +/- 0'.546. A dark matter model is fit to the angular correlation function to estimate the linear bias. At the average redshift of our survey ( z = 3.38), the bias is b = 6.78 +/- 1.79. Using this bias, we calculate a characteristic dark matter halo mass of 1.70-9.83x10(12)h(-1) M-circle dot. Our bias estimate suggests that quasar feedback intermittently shuts down the accretion of gas onto the central supermassive black hole at early times. If confirmed, these results hint at a level of luminosity dependence in the clustering of quasars at high-z.
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Details
- Title
- The Clustering of High-redshift (2.9 <= z <= 5.1) Quasars in SDSS Stripe 82
- Creators
- John D. Timlin - Drexel UniversityNicholas P. Ross - Royal ObservatoryGordon T. Richards - Drexel UniversityAdam D. Myers - University of WyomingAndrew Pellegrino - Drexel UniversityFranz E. Bauer - Millennium InstituteMark Lacy - National Radio Astronomy ObservatoryDonald P. Schneider - Pennsylvania State UniversityEdward J. Wollack - Goddard Space Flight CenterNadia L. Zakamska - Johns Hopkins UniversityLawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Publication Details
- The Astrophysical journal, v 859(1)
- Publisher
- Iop Publishing Ltd
- Number of pages
- 21
- Grant note
- 1515404; 1616168; 1411773 / NSF; National Science Foundation (NSF) Basal-CATA PFB-06/2007 / CONICYT-Chile; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) NNX16AN48G / NASA; National Aeronautics & Space Administration (NASA) 1141218 / FONDECYT; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); CONICYT FONDECYT ST/L00481X/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) NNX17AF04G / NASA-ADAP 1616168 / Division Of Astronomical Sciences; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) IC120009 / Ministry of Economy, Development, and Tourism's Millennium Science Initiative NASA; National Aeronautics & Space Administration (NASA)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000432540700010
- Scopus ID
- 2-s2.0-85048029622
- Other Identifier
- 991019168709304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics