The weak lensing signal and the clustering of BOSS galaxies. I. Measurements

Journal Article · Wed Jun 10 04:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/806/1/1· OSTI ID:22883113

Miyatake, Hironao; Spergel, David N. ^[1]; More, Surhud; Takada, Masahiro ^[2]; Mandelbaum, Rachel ^[3]; Kneib, Jean-Paul ^[4]; Schneider, Donald P. ^[5]; Brinkmann, J. ^[6]; Brownstein, Joel R. ^[7]

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1. Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton NJ 08544 (United States)
2. Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo, Chiba 277-8582 (Japan)
3. McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213 (United States)
4. Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388, Marseille (France)
5. Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)
6. Apache Point Observatory, P.O. Box 59 Sunspot, NM 88349 (United States)
7. Department of Physics and Astronomy, University of Utah, 115 S 1400 E, Salt Lake City, UT 84112 (United States)

A joint analysis of the clustering of galaxies and their weak gravitational lensing signal is well-suited to simultaneously constrain the galaxy–halo connection as well as the cosmological parameters by breaking the degeneracy between galaxy bias and the amplitude of clustering signal. In a series of two papers, we perform such an analysis at the highest redshift (z∼0.53) in the literature using CMASS galaxies in the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey Eleventh Data Release (BOSS DR11) catalog spanning 8300 deg{sup 2}. In this paper, we present details of the clustering and weak lensing measurements of these galaxies. We define a subsample of 400,916 CMASS galaxies based on their redshifts and stellar-mass estimates so that the galaxies constitute an approximately volume-limited and similar population over the redshift range 0.47⩽z⩽0.59. We obtain a signal-to-noise ratio (S/N) ≃ 56 for the galaxy clustering measurement. We also explore the redshift and stellar-mass dependence of the clustering signal. For the weak lensing measurement, we use existing deeper imaging data from the Canada–France–Hawaii Telescope Legacy Survey with publicly available shape and photometric redshift catalogs from CFHTLenS, but only in a 105 deg{sup 2} area that overlaps with BOSS. This restricts the lensing measurement to only 5084 CMASS galaxies. After careful systematic tests, we find a highly significant detection of the CMASS weak lensing signal, with total S/N ≃ 26. These measurements form the basis of the halo occupation distribution and cosmology analysis presented in More et al. (Paper II).

• OSTI ID: 22883113
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 806; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BARYONS
CATALOGS
COSMOLOGY
DISTRIBUTION
GALAXIES
GRAVITATIONAL LENSES
MASS
RED SHIFT
SIGNAL-TO-NOISE RATIO
TELESCOPES
UNIVERSE