A MEASUREMENT OF ARCMINUTE ANISOTROPY IN THE COSMIC MICROWAVE BACKGROUND WITH THE SUNYAEV-ZEL'DOVICH ARRAY

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

来源：Astrophysical Journal, 2010, 713(1): 82-89.

DOI：10.1088/0004-637X/713/1/82

• cosmic background radiation
• cosmological parameters
• cosmology: observations
• large-scale structure of universe
• techniques: interferometric

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(-50)(+77) mu K(2); of which 26 +/- 5 mu K(2) is the expected contribution from primary CMB anisotropy and 80 +/- 54 mu K(2) is the expected contribution from undetected radio sources. These results imply an upper limit of 155 mu K(2) (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., sigma(8) similar to 0.8.

• 出版日期2010-4-10