THE WEAK LENSING SIGNAL and the CLUSTERING of BOSS GALAXIES. II. ASTROPHYSICAL and COSMOLOGICAL CONSTRAINTS

Surhud More, Hironao Miyatake, Rachel Mandelbaum, Masahiro Takada, David N. Spergel, Joel R. Brownstein, Donald P. Schneider

Research output: Contribution to journalArticle

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Abstract

We perform a joint analysis of the abundance, the clustering, and the galaxy-galaxy lensing signal of galaxies measured from Data Release 11 of the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey in our companion paper, Miyatake et al. The lensing signal was obtained by using the shape catalog of background galaxies from the Canada France Hawaii Telescope Legacy Survey, which was made publicly available by the CFHTLenS collaboration, with an area overlap of about 105 deg2. We analyze the data in the framework of the halo model in order to fit halo occupation parameters and cosmological parameters (Ω and ) to these observables simultaneously, and thus break the degeneracy between galaxy bias and cosmology. Adopting a flat ΛCDM cosmology with priors on Ω, , and h from the analysis of WMAP 9 yr data, we obtain constraints on the stellar mass-halo mass relation of galaxies in our sample. Marginalizing over the halo occupation distribution parameters and a number of other nuisance parameters in our model, we obtain Ω and (68% confidence). We demonstrate the robustness of our results with respect to sample selection and a variety of systematics such as the halo off-centering effect and possible incompleteness in our sample. Our constraints are consistent, complementary, and competitive with those obtained using other independent probes of these cosmological parameters. The cosmological analysis is the first of its kind to be performed at a redshift as high as 0.53.

Original languageEnglish (US)
Article number2
JournalAstrophysical Journal
Volume806
Issue number1
DOIs
StatePublished - Jun 10 2015

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • cosmological parameters
  • cosmology: observations
  • cosmology: theory
  • dark matter
  • gravitational lensing: weak
  • large-scale structure of universe

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    More, S., Miyatake, H., Mandelbaum, R., Takada, M., Spergel, D. N., Brownstein, J. R., & Schneider, D. P. (2015). THE WEAK LENSING SIGNAL and the CLUSTERING of BOSS GALAXIES. II. ASTROPHYSICAL and COSMOLOGICAL CONSTRAINTS. Astrophysical Journal, 806(1), [2]. https://doi.org/10.1088/0004-637X/806/1/2