Quasar Clustering at 25 h−1 kpc from a Complete Sample of Binaries

@article{Myers2007QuasarCA,
title={Quasar Clustering at 25 h−1 kpc from a Complete Sample of Binaries},
author={Adam D. Myers and Gordon T. Richards and Robert J. Brunner and Donald P. Schneider and Natalie E. Strand and Patrick B. Hall and Jeff Blomquist and Donald G. York},
journal={The Astrophysical Journal},
year={2007},
volume={678},
pages={635 - 646}
}
• Published 21 September 2007
• Physics
• The Astrophysical Journal
We present spectroscopy of binary quasar candidates, with component separations of 3'' ⩽ Δ θ < 6'', selected from Data Release 4 of the Sloan Digital Sky Survey (SDSS DR4) using kernel density estimation (KDE). Of our 27 new quasar pair observations, 10 are binary quasars, which doubles the number of known g < 21 binaries with 3'' ⩽ Δ θ < 6'' separations. Several of our observed binaries are wide-separation lens candidates that merit additional higher resolution spectroscopy, as well as deep…
86 Citations

Figures and Tables from this paper

BINARY QUASARS AT HIGH REDSHIFT. I. 24 NEW QUASAR PAIRS AT z ∼ 3–4
• Physics
• 2009
The clustering of quasars on small scales yields fundamental constraints on models of quasar evolution and the buildup of supermassive black holes. This paper describes the first systematic survey to
A Constraint on Quasar Clustering at z=5 from a Binary Quasar
• Physics
• 2016
We report the discovery of a quasar pair at z = 5 separated by 21″. Both objects were identified as quasar candidates using simple color selection techniques applied to photometric catalogs from the
Clustering on very small scales from a large sample of confirmed quasar pairs: does quasar clustering track from Mpc to kpc scales?
• Physics
• 2017
We present the most precise estimate to date of the clustering of quasars on very small scales, based on a sample of 47 binary quasars with magnitudes of g < 20.85 and proper transverse separations
Very small scale clustering of quasars from a complete quasar lens survey
• Physics
• 2012
We measure the small-scale (comoving separation ) two-point correlation function of quasars using a sample of 26 spectroscopically confirmed binary quasars at 0.6 < z < 2.2 from the Sloan Digital Sky
The environment of low-redshift quasar pairs
• Physics
• 2014
We investigate the properties of the galaxy environment of a sample of 14 low-redshift ( z< 0.85) quasar (QSO) physical pairs extracted from Sloan Digital Sky Survey Data Release 10 archives. The
BINARY QUASARS AT HIGH REDSHIFT. II. SUB-Mpc CLUSTERING AT z ∼ 3–4
• Physics
• 2009
We present measurements of the small-scale (0.1 ≲ r ≲ 1 h−1 Mpc) quasar two-point correlation function at z>2.9, for a flux-limited (i < 21) sample of 15 binary quasars compiled by Hennawi et al. The
QUASAR CLUSTERING FROM SDSS DR5: DEPENDENCES ON PHYSICAL PROPERTIES
• Physics
• 2009
Using a homogenous sample of 38,208 quasars with a sky coverage of ∼4000 deg2 drawn from the Sloan Digital Sky Survey Data Release Five quasar catalog, we study the dependence of quasar clustering on
A Halo Occupation Interpretation of Quasars at z ∼ 1.5 Using Very Small-Scale Clustering Information
• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
We combine the most precise small-scale ($\lt 100\, \rm h^{-1}kpc$) quasar clustering constraints to date with recent measurements at large scales ($\gt 1\, \rm h^{-1}Mpc$) from the extended Baryon
THE HALO OCCUPATION DISTRIBUTION OF SDSS QUASARS
• Physics
• 2012
We present an estimate of the projected two-point correlation function (2PCF) of quasars in the Sloan Digital Sky Survey (SDSS) over the full range of one- and two-halo scales, 0.02 h −1 Mpc < rp <
The Spectral and Environment Properties of z ∼ 2.0–2.5 Quasar Pairs
• Physics
The Astrophysical Journal
• 2018
We present the first results from our survey of intervening and proximate Lyman limit systems (LLSs) at z ∼ 2.0–2.5 using the Wide Field Camera 3 on board the Hubble Space Telescope. The quasars in

References

SHOWING 1-10 OF 55 REFERENCES
Binary Quasars in the Sloan Digital Sky Survey: Evidence for Excess Clustering on Small Scales
• Physics
• 2006
We present a sample of 221 new quasar pairs with proper transverse separations Rprop < 1 h-1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to find
First Measurement of the Clustering Evolution of Photometrically Classified Quasars
• Physics
• 2006
We present new measurements of the quasar angular autocorrelation function from a sample of ~80,000 photometrically classified quasars taken from the First Data Release of the Sloan Digital Sky
Clustering Analyses of 300,000 Photometrically Classified Quasars. II. The Excess on Very Small Scales
• Physics
• 2006
We study quasar clustering on small scales, modeling clustering amplitudes using halo-driven dark matter descriptions. From 91 pairs on scales <35 h-1 kpc, we detect only a slight excess in quasar
Binary quasars
• Physics
• 2000
Quasar pairs are either physically distinct binary quasars or the result of gravitational lensing. The majority of known pairs are in fact lenses, with a few conﬁrmed as binaries, leaving a
Cosmic evolution of quasar clustering: implications for the host haloes
• Physics
• 2004
We present detailed clustering measurements from the 2dF Quasi-Stellar Object Redshift Survey (2QZ) in the redshift range 0.8 < z < 2.1. Using a flux-limited sample of ∼14 000 objects with effective
Colors of 2625 Quasars at 0 < z < 5 Measured in the Sloan Digital Sky Survey Photometric System
• Physics
• 2000
We present an empirical investigation of the colors of quasars in the Sloan Digital Sky Survey (SDSS) photometric system. The sample studied includes 2625 quasars with SDSS photometry: 1759 quasars
Quasars Probing Quasars. II. The Anisotropic Clustering of Optically Thick Absorbers around Quasars
• Physics
• 2007
With close pairs of quasars at different redshifts, a background quasar sight line can be used to study a foreground quasar's environment in absorption. We used a sample of 17 Lyman limit systems
Clustering of High-Redshift (z ≥ 2.9) Quasars from the Sloan Digital Sky Survey
• Physics
• 2007
We study the two-point correlation function of a uniformly selected sample of 4426 luminous optical quasars with redshift 2.9 ≤ z ≤ 5.4 selected over 4041 deg2 from the Fifth Data Release of the
EFFICIENT PHOTOMETRIC SELECTION OF QUASARS FROM THE SLOAN DIGITAL SKY SURVEY. II. ∼1, 000, 000 QUASARS FROM DATA RELEASE 6
• Physics
The Astrophysical Journal Supplement Series
• 2004
We present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data of the Sloan Digital Sky Survey (SDSS). The objects are all point sources to a limiting magnitude of i =
THE SLOAN DIGITAL SKY SURVEY QUASAR LENS SEARCH. II. STATISTICAL LENS SAMPLE FROM THE THIRD DATA RELEASE
• Physics
• 2008
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the