THE ATACAMA COSMOLOGY TELESCOPE: DETECTION OF SUNYAEV-ZEL'DOVICH DECREMENT IN GROUPS AND CLUSTERS ASSOCIATED WITH LUMINOUS RED GALAXIES

Journal Article · Wed Jul 20 04:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/736/1/39· OSTI ID:21578320

Hand, Nick; Das, Sudeep; Dunkley, Joanna; Hajian, Amir ^[1]; Appel, John W; Essinger-Hileman, Thomas; Fowler, Joseph W; Hincks, Adam D ^[2]; Battaglia, Nick; Richard Bond, J ^[3]; Devlin, Mark J; Klein, Jeff ^[4]; Duenner, Rolando ^[5]; Halpern, Mark; Hasselfield, Matthew ^[6]; Hilton, Matt ^[7]; Hlozek, Renee ^[8]; Hughes, John P ^[9]; Irwin, Kent D ^[10]; Kosowsky, Arthur ^[11]

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1. Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544 (United States)
2. Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, NJ 08544 (United States)
3. Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, ON M5S 3H8 (Canada)
4. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States)
5. Departamento de Astronomia y Astrofisica, Facultad de Fisica, PontificIa Universidad Catolica, Casilla 306, Santiago 22 (Chile)
6. Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z4 (Canada)
7. Astrophysics and Cosmology Research Unit, School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041 (South Africa)
8. Department of Astrophysics, Oxford University, Oxford, OX1 3RH (United Kingdom)
9. Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854-8019 (United States)
10. NIST Quantum Devices Group, Boulder, CO 80305 (United States)
11. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 (United States)

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{sub 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{sup 14} M{sub sun}.

• OSTI ID: 21578320
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 736; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COMPUTERIZED SIMULATION
COSMOLOGY
DETECTION
GALAXIES
GALAXY CLUSTERS
GRAVITATIONAL LENSES
LENSES
LUMINOSITY
MASS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SIMULATION