A COSMIC MICROWAVE BACKGROUND LENSING MASS MAP AND ITS CORRELATION WITH THE COSMIC INFRARED BACKGROUND

作者：Holder G P^*; Viero M P; Zahn O; Aird K A; Benson B A; Bhattacharya S; Bleem L E; Bock J; Brodwin M; Carlstrom J E; Chang C L; Cho H M; Conley A; Crawford T M; Crites A T; de Haan T; Dobbs M A; Dudley J; George E M; Halverson N W; Holzapfel W L; Hoover S; Hou Z; Hrubes J D; Keisler R; Knox L; Lee A T; Leitch E M; Lueker M; Luong Van D; Marsden G; Marrone D P; McMahon J J; Mehl J; Meyer S S; Millea M

来源：Astrophysical Journal Letters, 2013, 771(1): L16.

DOI：10.1088/2041-8205/771/1/L16

• cosmic background radiation
• galaxies: structure

We use a temperature map of the cosmic microwave background (CMB) obtained using the South Pole Telescope at 150 GHz to construct a map of the gravitational convergence to z similar to 1100, revealing the fluctuations in the projected mass density. This map shows individual features that are significant at the similar to 4 sigma level, providing the first image of CMB lensing convergence. We cross-correlate this map with Herschel/SPIRE maps covering 90 deg(2) at wavelengths of 500, 350, and 250 mu m. We show that these submillimeter (submm) wavelength maps are strongly correlated with the lensing convergence map, with detection significances in each of the three submm bands ranging from 6.7 sigma to 8.8 sigma. We fit the measurement of the cross power spectrum assuming a simple constant bias model and infer bias factors of b = 1.3-1.8, with a statistical uncertainty of 15%, depending on the assumed model for the redshift distribution of the dusty galaxies that are contributing to the Herschel/SPIRE maps.

• 出版日期2013-7-1