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The angular clustering of galaxy pairs

  • Leopoldo Infante
  • , Michael A. Strauss
  • , Neta A. Bahcall
  • , Gillian R. Knapp
  • , Robert H. Lupton
  • , Rita S.J. Kim
  • , Michael S. Vogeley
  • , J. Brinkmann
  • , Istvan Csabai
  • , Masataka Fukugita
  • , Gregory Hennessy
  • , Željko Ivezić
  • , Don Q. Lamb
  • , Brian C. Lee
  • , Jeffrey R. Pier
  • , D. G. York

Research output: Contribution to journalArticlepeer-review

Abstract

We identify close pairs of galaxies from 278 deg2 of Sloan Digital Sky Survey commissioning imaging data. The pairs are drawn from a sample of 330,041 galaxies with 18 < r* < 20. We determine the angular correlation function of galaxy pairs and find it to be stronger than the correlation function of single galaxies by a factor of 2.9 ± 0.4. The two correlation functions have the same logarithmic slope of 0.77. We invert Limber's equation to estimate the three-dimensional correlation functions; we find clustering lengths of r0 = 4.2 ± 0.4 h -1 Mpc for galaxies and 7.8 ± 0.7 h-1 Mpc for galaxy pairs. These results agree well (with the global richness dependence of the correlation functions of galaxy systems.

Original languageEnglish (US)
Pages (from-to)155-162
Number of pages8
JournalAstrophysical Journal
Volume567
Issue number1 I
DOIs
StatePublished - Mar 1 2002

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Galaxies: clusters: general
  • Galaxies: evolution
  • Galaxies: formation
  • Galaxies: interactions

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