期刊
ASTROPHYSICAL JOURNAL
卷 736, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/736/1/39
关键词
cosmic background radiation; cosmology: observations; galaxies: clusters: general
资金
- Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT)
- U.S. National Science Foundation [AST-0408698, PHY-0355328, AST-0707731, PIRE-0507768]
- Princeton University
- University of Pennsylvania
- RCUK
- Canada Foundation for Innovation under Compute Canada
- Government of Ontario
- Ontario Research Fund-Research Excellence
- University of Toronto
- NASA [NNX08AH30G]
- Natural Science and Engineering Research Council of Canada (NSERC)
- NSF [AST-0546035, AST-0606975]
- NSF Physics Frontier Center [PHY-0114422]
- U.S. Department of Energy [DE-AC3-76SF00515]
- Berkeley Center for Cosmological Physics
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0965625] Funding Source: National Science Foundation
- NASA [NNX08AH30G, 101243] Funding Source: Federal RePORTER
We present a detection of the Sunyaev-Zel'dovich (SZ) decrement associated with the luminous red galaxy (LRG) sample of the Sloan Digital Sky Survey. The SZ data come from 148 GHz maps of the equatorial region made by the Atacama Cosmology Telescope. The LRG sample is divided by luminosity into four bins, and estimates for the central SZ temperature decrement are calculated through a stacking process. We detect and account for a bias of the SZ signal due to weak radio sources. We use numerical simulations to relate the observed decrement to Y-200 and clustering properties to relate the galaxy luminosity to halo mass. We also use a relation between brightest cluster galaxy luminosity and cluster mass based on stacked gravitational lensing measurements to estimate the characteristic halo masses. The masses are found to be around 10(14) M-circle dot.
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