教師資料查詢 | 類別: 期刊論文 | 教師: 劉國欽 LIOU GUO CHIN (瀏覽個人網頁)

標題:Improved dark energy detection through the polarization-assisted cross correlation of the cosmic microwave background with radio sources
學年99
學期2
出版(發表)日期2011/03/02
作品名稱Improved dark energy detection through the polarization-assisted cross correlation of the cosmic microwave background with radio sources
作品名稱(其他語言)
著者Liu, Guo-Chin; Ng, Kin-Wang; Pen, Ue-Li
單位淡江大學物理學系
出版者College Park: American Physical Society
著錄名稱、卷期、頁數Physical Review D 83(6), 063001(5 pages)
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.
關鍵字
語言英文
ISSN1550-7998;1550-2368
期刊性質國外
收錄於SCI;
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,紙本
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