A measurement of arcminute anisotropy in the cosmic microwave background with the sunyaev-zel'dovich array

Matthew K. Sharp, Daniel P. Marrone, John E. Carlstrom, Thomas Culverhouse, Christopher Greer, David Hawkins, Ryan Hennessy, Marshall Joy, James W. Lamb, Erik M. Leitch, Michael Loh, Amber Miller, Tony Mroczkowski, Stephen Muchovej, Clem Pryke, David Woody

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We present 30 GHz measurements of the angular power spectrum of the cosmic microwave background (CMB) obtained with the Sunyaev-Zel'dovich Array. The measurements are sensitive to arcminute angular scales, where secondary anisotropy from the Sunyaev-Zel'dovich effect (SZE) is expected to dominate. For a broad bin centered at multipole 4066, we find 67+77 -50 μK2; of which 26 ± 5 μK2 is the expected contribution from primary CMB anisotropy and 80 ± 54 μK2 is the expected contribution from undetected radio sources. These results imply an upper limit of 155 μK2 (95% CL) on the secondary contribution to the anisotropy in our maps. This level of SZE anisotropy power is consistent with expectations based on recent determinations of the normalization of the matter power spectrum, i.e., σ ∼ 8 0.8.

Original languageEnglish (US)
Pages (from-to)82-89
Number of pages8
JournalAstrophysical Journal
Volume713
Issue number1
DOIs
StatePublished - 2010

Keywords

  • Cosmic background radiation
  • Cosmological parameters
  • Cosmology: observations
  • Large-scale structure of universe
  • Techniques: interferometric

Fingerprint Dive into the research topics of 'A measurement of arcminute anisotropy in the cosmic microwave background with the sunyaev-zel'dovich array'. Together they form a unique fingerprint.

Cite this