GALAXY-MASS CORRELATIONS ON 10 Mpc SCALES IN THE DEEP LENS SURVEY

We examine the projected correlation of galaxies with mass from small scales (<few hundred kpc), where individual dark matter halos dominate, out to 15 Mpc, where correlated large-scale structure dominates. We investigate these profiles as a function of galaxy luminosity and redshift. Selecting 0...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 759; no. 2; p. 101
Main Authors CHOI, A, TYSON, J. A, MORRISON, C. B, JEE, M. J, SCHMIDT, S. J, MARGONINER, V. E, WITTMAN, D. M
Format Journal Article
LanguageEnglish
Published Bristol IOP 10.11.2012
Subjects
ASTRONOMY
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
CORRELATIONS
COSMOLOGY
Earth, ocean, space
Exact sciences and technology
GALACTIC EVOLUTION
GALAXIES
GRAVITATIONAL LENSES
LUMINOSITY
MASS
NONLUMINOUS MATTER
RED SHIFT
SHEAR
UNIVERSE
Galaxy evolution
Red shift
Shear
Galaxies
galaxies: evolution
Absolute magnitude
Selection effect
Luminosity
Gravitational lensing
Large-scale structure
gravitational lensing: weak
Dark matter
Correlations
Tomography
Cosmology
cosmology: observations
large-scale structure of universe
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Summary:We examine the projected correlation of galaxies with mass from small scales (<few hundred kpc), where individual dark matter halos dominate, out to 15 Mpc, where correlated large-scale structure dominates. We investigate these profiles as a function of galaxy luminosity and redshift. Selecting 0.8 million galaxies in the Deep Lens Survey, we use photometric redshifts and stacked weak gravitational lensing shear tomography out to radial scales of 1 Degree-Sign from the centers of foreground galaxies. We detect correlated mass density from multiple halos and large-scale structure at radii larger than the virial radius and find the first observational evidence for growth in the galaxy-mass correlation on 10 Mpc scales with decreasing redshift and fixed range of luminosity. For a fixed range of redshift, we find a scaling of projected halo mass with rest-frame luminosity similar to previous studies at lower redshift. We control systematic errors in shape measurement and photometric redshift, enforce volume completeness through absolute magnitude cuts, and explore residual sample selection effects via simulations.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/759/2/101