Binary quasars in the sloan digital sky survey: Evidence for excess clustering on small scales

Joseph F. Hennawi, Michael A. Strauss, Masamune Oguri, Naohisa Inada, Gordon T. Richards, Bartosz Pindor, Donald P. Schneider, Robert H. Becker, Michael D. Gregg, Patrick B. Hall, David E. Johnston, Xiaohui Fan, Scott Burles, David J. Schlegel, James E. Gunn, Robert H. Lupton, Neta A. Bahcall, Robert J. Brunner, Jon Brinkmann

Research output: Contribution to journalArticle

193 Citations (Scopus)

Abstract

We present a sample of 221 new quasar pairs with proper transverse separations R prop < 1 h -1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to find companions around the Sloan Digital Sky Survey and 2dF QSO Redshift Survey quasars. This sample includes 26 new binary quasars with separations R prop < 50 h -1 kpc (θ < 10″), more than doubling the number of such systems known. We define a statistical sample of binaries selected with homogeneous criteria and compute its selection function, taking into account sources of incompleteness. The first measurement of the quasar correlation function on scales 10 h -1 kpc < R prop < 400 h -1 kpc is presented. For R prop ≲ 40 h -1 kpc, we detect an order of magnitude excess clustering over the expectation from the large-scale (R prop ≳ 3 h -1 Mpc) quasar correlation function, extrapolated down as a power law (γ = 1.53) to the separations probed by our binaries. The excess grows to ∼30 at R prop 10 h -1 kpc and provides compelling evidence that the quasar autocorrelation function gets progressively steeper on submegaparsec scales. This small-scale excess can likely be attributed to dissipative interaction events that trigger quasar activity in rich environments. Recent small-scale measurements of galaxy clustering and quasar-galaxy clustering are reviewed and discussed in relation to our measurement of small-scale quasar clustering.

Original languageEnglish (US)
Pages (from-to)1-23
Number of pages23
JournalAstronomical Journal
Volume131
Issue number1
DOIs
StatePublished - Jan 2006

Fingerprint

quasars
autocorrelation
power law
galaxies
actuators

Keywords

  • Cosmology: observations
  • Large-scale structure of universe
  • Quasars: general
  • Surveys

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Hennawi, J. F., Strauss, M. A., Oguri, M., Inada, N., Richards, G. T., Pindor, B., ... Brinkmann, J. (2006). Binary quasars in the sloan digital sky survey: Evidence for excess clustering on small scales. Astronomical Journal, 131(1), 1-23. https://doi.org/10.1086/498235

Binary quasars in the sloan digital sky survey : Evidence for excess clustering on small scales. / Hennawi, Joseph F.; Strauss, Michael A.; Oguri, Masamune; Inada, Naohisa; Richards, Gordon T.; Pindor, Bartosz; Schneider, Donald P.; Becker, Robert H.; Gregg, Michael D.; Hall, Patrick B.; Johnston, David E.; Fan, Xiaohui; Burles, Scott; Schlegel, David J.; Gunn, James E.; Lupton, Robert H.; Bahcall, Neta A.; Brunner, Robert J.; Brinkmann, Jon.

In: Astronomical Journal, Vol. 131, No. 1, 01.2006, p. 1-23.

Research output: Contribution to journalArticle

Hennawi, JF, Strauss, MA, Oguri, M, Inada, N, Richards, GT, Pindor, B, Schneider, DP, Becker, RH, Gregg, MD, Hall, PB, Johnston, DE, Fan, X, Burles, S, Schlegel, DJ, Gunn, JE, Lupton, RH, Bahcall, NA, Brunner, RJ & Brinkmann, J 2006, 'Binary quasars in the sloan digital sky survey: Evidence for excess clustering on small scales', Astronomical Journal, vol. 131, no. 1, pp. 1-23. https://doi.org/10.1086/498235
Hennawi JF, Strauss MA, Oguri M, Inada N, Richards GT, Pindor B et al. Binary quasars in the sloan digital sky survey: Evidence for excess clustering on small scales. Astronomical Journal. 2006 Jan;131(1):1-23. https://doi.org/10.1086/498235
Hennawi, Joseph F. ; Strauss, Michael A. ; Oguri, Masamune ; Inada, Naohisa ; Richards, Gordon T. ; Pindor, Bartosz ; Schneider, Donald P. ; Becker, Robert H. ; Gregg, Michael D. ; Hall, Patrick B. ; Johnston, David E. ; Fan, Xiaohui ; Burles, Scott ; Schlegel, David J. ; Gunn, James E. ; Lupton, Robert H. ; Bahcall, Neta A. ; Brunner, Robert J. ; Brinkmann, Jon. / Binary quasars in the sloan digital sky survey : Evidence for excess clustering on small scales. In: Astronomical Journal. 2006 ; Vol. 131, No. 1. pp. 1-23.
@article{7a179936a8ed4e3c969535f8d550565e,
title = "Binary quasars in the sloan digital sky survey: Evidence for excess clustering on small scales",
abstract = "We present a sample of 221 new quasar pairs with proper transverse separations R prop < 1 h -1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to find companions around the Sloan Digital Sky Survey and 2dF QSO Redshift Survey quasars. This sample includes 26 new binary quasars with separations R prop < 50 h -1 kpc (θ < 10″), more than doubling the number of such systems known. We define a statistical sample of binaries selected with homogeneous criteria and compute its selection function, taking into account sources of incompleteness. The first measurement of the quasar correlation function on scales 10 h -1 kpc < R prop < 400 h -1 kpc is presented. For R prop ≲ 40 h -1 kpc, we detect an order of magnitude excess clustering over the expectation from the large-scale (R prop ≳ 3 h -1 Mpc) quasar correlation function, extrapolated down as a power law (γ = 1.53) to the separations probed by our binaries. The excess grows to ∼30 at R prop 10 h -1 kpc and provides compelling evidence that the quasar autocorrelation function gets progressively steeper on submegaparsec scales. This small-scale excess can likely be attributed to dissipative interaction events that trigger quasar activity in rich environments. Recent small-scale measurements of galaxy clustering and quasar-galaxy clustering are reviewed and discussed in relation to our measurement of small-scale quasar clustering.",
keywords = "Cosmology: observations, Large-scale structure of universe, Quasars: general, Surveys",
author = "Hennawi, {Joseph F.} and Strauss, {Michael A.} and Masamune Oguri and Naohisa Inada and Richards, {Gordon T.} and Bartosz Pindor and Schneider, {Donald P.} and Becker, {Robert H.} and Gregg, {Michael D.} and Hall, {Patrick B.} and Johnston, {David E.} and Xiaohui Fan and Scott Burles and Schlegel, {David J.} and Gunn, {James E.} and Lupton, {Robert H.} and Bahcall, {Neta A.} and Brunner, {Robert J.} and Jon Brinkmann",
year = "2006",
month = "1",
doi = "10.1086/498235",
language = "English (US)",
volume = "131",
pages = "1--23",
journal = "Astronomical Journal",
issn = "0004-6256",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Binary quasars in the sloan digital sky survey

T2 - Evidence for excess clustering on small scales

AU - Hennawi, Joseph F.

AU - Strauss, Michael A.

AU - Oguri, Masamune

AU - Inada, Naohisa

AU - Richards, Gordon T.

AU - Pindor, Bartosz

AU - Schneider, Donald P.

AU - Becker, Robert H.

AU - Gregg, Michael D.

AU - Hall, Patrick B.

AU - Johnston, David E.

AU - Fan, Xiaohui

AU - Burles, Scott

AU - Schlegel, David J.

AU - Gunn, James E.

AU - Lupton, Robert H.

AU - Bahcall, Neta A.

AU - Brunner, Robert J.

AU - Brinkmann, Jon

PY - 2006/1

Y1 - 2006/1

N2 - We present a sample of 221 new quasar pairs with proper transverse separations R prop < 1 h -1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to find companions around the Sloan Digital Sky Survey and 2dF QSO Redshift Survey quasars. This sample includes 26 new binary quasars with separations R prop < 50 h -1 kpc (θ < 10″), more than doubling the number of such systems known. We define a statistical sample of binaries selected with homogeneous criteria and compute its selection function, taking into account sources of incompleteness. The first measurement of the quasar correlation function on scales 10 h -1 kpc < R prop < 400 h -1 kpc is presented. For R prop ≲ 40 h -1 kpc, we detect an order of magnitude excess clustering over the expectation from the large-scale (R prop ≳ 3 h -1 Mpc) quasar correlation function, extrapolated down as a power law (γ = 1.53) to the separations probed by our binaries. The excess grows to ∼30 at R prop 10 h -1 kpc and provides compelling evidence that the quasar autocorrelation function gets progressively steeper on submegaparsec scales. This small-scale excess can likely be attributed to dissipative interaction events that trigger quasar activity in rich environments. Recent small-scale measurements of galaxy clustering and quasar-galaxy clustering are reviewed and discussed in relation to our measurement of small-scale quasar clustering.

AB - We present a sample of 221 new quasar pairs with proper transverse separations R prop < 1 h -1 Mpc over the redshift range 0.5 < z < 3.0, discovered from an extensive follow-up campaign to find companions around the Sloan Digital Sky Survey and 2dF QSO Redshift Survey quasars. This sample includes 26 new binary quasars with separations R prop < 50 h -1 kpc (θ < 10″), more than doubling the number of such systems known. We define a statistical sample of binaries selected with homogeneous criteria and compute its selection function, taking into account sources of incompleteness. The first measurement of the quasar correlation function on scales 10 h -1 kpc < R prop < 400 h -1 kpc is presented. For R prop ≲ 40 h -1 kpc, we detect an order of magnitude excess clustering over the expectation from the large-scale (R prop ≳ 3 h -1 Mpc) quasar correlation function, extrapolated down as a power law (γ = 1.53) to the separations probed by our binaries. The excess grows to ∼30 at R prop 10 h -1 kpc and provides compelling evidence that the quasar autocorrelation function gets progressively steeper on submegaparsec scales. This small-scale excess can likely be attributed to dissipative interaction events that trigger quasar activity in rich environments. Recent small-scale measurements of galaxy clustering and quasar-galaxy clustering are reviewed and discussed in relation to our measurement of small-scale quasar clustering.

KW - Cosmology: observations

KW - Large-scale structure of universe

KW - Quasars: general

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=31544436938&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31544436938&partnerID=8YFLogxK

U2 - 10.1086/498235

DO - 10.1086/498235

M3 - Article

AN - SCOPUS:31544436938

VL - 131

SP - 1

EP - 23

JO - Astronomical Journal

JF - Astronomical Journal

SN - 0004-6256

IS - 1

ER -