The Clustering of Luminous Red Galaxies at z ∼ 0.7 from EBOSS and BOSS Data

Zhongxu Zhai, Jeremy L. Tinker, Changhoon Hahn, Hee Jong Seo, Michael R. Blanton, Rita Tojeiro, Hugo O. Camacho, Marcos Lima, Aurelio Carnero Rosell, Flavia Sobreira, Luiz N.Da Costa, Julian E. Bautista, Joel R. Brownstein, Johan Comparat, Kyle Dawson, Jeffrey A. Newman, Abhishek Prakash, Alexandre Roman-Lopes, Donald P. Schneider

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21 Scopus citations

Abstract

We present the first scientific results from the luminous red galaxy (LRG) sample of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) combined with the high-redshift galaxies of the previous BOSS sample. We measure the small- and intermediate-scale clustering from a sample of more than 97,000 galaxies in the redshift range 0.6 < z < 0.9. We interpret these measurements in the framework of the Halo Occupation Distribution. The bias of this sample of LRGs is 2.30 ± 0.03, with a satellite fraction of 13% ± 3% and a mean halo mass of 2.5 × 1013 h-1M ⊙. These results are consistent with expectations, demonstrating that these LRGs will be reliable tracers of large-scale structure at z ∼ 0.7. The galaxy bias implies a scatter of luminosity at fixed halo mass, slog L, of 0.19 dex. Using the clustering of massive galaxies from BOSS CMASS, BOSS LOWZ, and SDSS, we find that slog L = 0.19 is consistent with observations over the full redshift range that these samples cover. The addition of eBOSS to previous surveys allows the investigation of the evolution of massive galaxies over the past ∼7 Gyr.

Original languageEnglish (US)
Article number76
JournalAstrophysical Journal
Volume848
Issue number2
DOIs
StatePublished - Oct 20 2017

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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