Improved dark energy detection through the polarization-assisted cross correlation of the cosmic microwave background with radio sources

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題名:	Improved dark energy detection through the polarization-assisted cross correlation of the cosmic microwave background with radio sources
作者:	Liu, Guo-Chin;Ng, Kin-Wang;Pen, Ue-Li
貢獻者:	淡江大學物理學系
日期:	2011-03-02
上傳時間:	2013-07-09 15:08:25 (UTC+8)
出版者:	College Park: American Physical Society
摘要:	Integrated Sachs-Wolfe (ISW) effect can be estimated by cross-correlating Cosmic Microwave Background (CMB) sky with tracers of the local matter distribution. At late cosmic time, the dark energy induced decay of gravitation potential generates a cross-correlation signal on large angular scales. The dominant noise are the intrinsic CMB anisotropies from the inflationary epoch. In this Letter we use CMB polarization to reduce this intrinsic noise. We cross-correlate the microwave sky observed by Wilkinson Microwave Anisotropy Probe (WMAP) with the radio source catalog compiled by NRAO VLA Sky Survey (NVSS) to study the efficiency of the noise suppression . We find that the error bars are reduced about 5-12 %, improving the statistical power.
關聯:	Physical Review D 83(6), 063001(5 pages)
DOI:	10.1103/PhysRevD.83.063001
顯示於類別:	[物理學系暨研究所] 期刊論文

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