The Clustering of Luminous Red Galaxies at z ∼ 0.7 from EBOSS and BOSS Data
- Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003 (United States)
- Department of Physics and Astronomy, Ohio University, 251B Clippinger Labs, Athens, OH 45701 (United States)
- Institute of Cosmology and Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth, PO1 3FX (United Kingdom)
- Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, CEP 05314-970, São Paulo, SP (Brazil)
- Laboratório Interinstitucional de e-Astronomia, 77 Rua Gal. José Cristino, Rio de Janeiro, RJ—20921-400 (Brazil)
- Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112 (United States)
- Instituto de Física Teórica UAM/CSIC, E-28049 Madrid (Spain)
- Department of Physics and Astronomy and PITT PACC, University of Pittsburgh, Pittsburgh, PA 15260 (United States)
- Departamento de Física, Facultad de Ciencias, Universidad de La Serena, Cisternas 1200, La Serena (Chile)
- Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)
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<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 2.5×10{sup 13} h{sup −1} M{sub ⊙}. 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, σ{sub logL}, of 0.19 dex. Using the clustering of massive galaxies from BOSS CMASS, BOSS LOWZ, and SDSS, we find that σ{sub logL}=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.
- OSTI ID:
- 22875695
- Journal Information:
- Astrophysical Journal, Vol. 848, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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