The Atacama cosmology telescope: Detection of Sunyaev-Zel'dovich decrement in groups and clusters associated with luminous red galaxies

Nick Hand, John W. Appel, Nick Battaglia, J. Richard Bond, Sudeep Das, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Thomas Essinger-Hileman, Joseph W. Fowler, Amir Hajian, Mark Halpern, Matthew Hasselfield, Matt Hilton, Adam D. Hincks, Renée Hlozek, John P. Hughes, Kent D. Irwin, Jeff Klein, Arthur KosowskyYen Ting Lin, Tobias A. Marriage, Danica Marsden, Mike McLaren, Felipe Menanteau, Kavilan Moodley, Michael D. Niemack, Michael R. Nolta, Lymana Page, Lucas Parker, Bruce Partridge, Reed Plimpton, Erik D. Reese, Felipe Rojas, Neelima Sehgal, Blaked Sherwin, Jonathan L. Sievers, David N. Spergel, Suzanne T. Staggs, Daniel S. Swetz, Ericr Switzer, Robert Thornton, Hy Trac, Katerina Visnjic, Ed Wollack

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

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 148GHz 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 Y200 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.

Original languageEnglish (US)
Article number39
JournalAstrophysical Journal
Volume736
Issue number1
DOIs
StatePublished - Jul 20 2011

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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