The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: the low-redshift sample

John K. Parejko, Tomomi Sunayama, Nikhil Padmanabhan, David A. Wake, Andreas A. Berlind, Dmitry Bizyaev, Michael Blanton, Adam S. Bolton, Frank van den Bosch, Jon Brinkmann, Joel R. Brownstein, Luiz Alberto Nicolaci da Costa, Daniel J. Eisenstein, Hong Guo, Eyal Kazin, Marcio Maia, Elena Malanushenko, Claudia Maraston, Cameron K. McBride, Robert C. NicholDaniel J. Oravetz, Kaike Pan, Will J. Percival, Francisco Prada, Ashley J. Ross, Nicholas P. Ross, David J. Schlegel, Don Schneider, Audrey E. Simmons, Ramin Skibba, Jeremy Tinker, Rita Tojeiro, Benjamin A. Weaver, Andrew Wetzel, Martin White, David H. Weinberg, Daniel Thomas, Idit Zehavi, Zheng Zheng

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Abstract

We report on the small-scale (0.5 <r <40 h-1 Mpc)clustering of 78 895 massive (M* ˜ 1011.3M⊙) galaxies at 0.2 <z <0.4 from the first twoyears of data from the Baryon Oscillation Spectroscopic Survey (BOSS),to be released as part of Sloan Digital Sky Survey (SDSS) Data Release 9(DR9). We describe the sample selection, basic properties of thegalaxies and caveats for working with the data. We calculate the real-and redshift-space two-point correlation functions of these galaxies,fit these measurements using halo occupation distribution (HOD)modelling within dark matter cosmological simulations, and estimate theerrors using mock catalogues. These galaxies lie in massive haloes, witha mean halo mass of 5.2 × 1013 h-1M⊙, a large-scale bias of ˜2.0 and a satellitefraction of 12 ± 2 per cent. Thus, these galaxies occupy haloeswith average masses in between those of the higher redshift BOSS CMASSsample and the original SDSS I/II luminous red galaxy sample.We report on the small-scale (0.5 < r < 40 h−1 Mpc) clustering of 78 895 massive (M* ∼ 1011.3 M) galaxies at 0.2 < z < 0.4 from the first two years of data from the Baryon Oscillation Spectroscopic Survey (BOSS), to be released as part of Sloan Digital Sky Survey (SDSS) Data Release 9 (DR9). We describe the sample selection, basic properties of the galaxies and caveats for working with the data. We calculate the real- and redshift-space two-point correlation functions of these galaxies, fit these measurements using halo occupation distribution (HOD) modelling within dark matter cosmological simulations, and estimate the errors using mock catalogues. These galaxies lie in massive haloes, with a mean halo mass of 5.2 × 1013h−1 M, a large-scale bias of ∼2.0 and a satellite fraction of 12 ± 2 per cent. Thus, these galaxies occupy haloes with average masses in between those of the higher redshift BOSS CMASS sample and the original SDSS I/II luminous red galaxy sample.
Original languageEnglish
Pages (from-to)98-112
JournalMonthly Notices of the Royal Astronomical Society
Volume429
Issue number1
DOIs
Publication statusPublished - 11 Feb 2013

Keywords

  • Large-scale structure of Universe
  • Galaxies: haloes
  • Galaxies: evolution
  • Galaxies: statistics
  • Surveys

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