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题名:
A halo approach to the evaluation of the cross-correlation between the SZ sky and galaxy surveys
作者: Qu, Y; Wu Xiangping(武向平)
关键词: cosmology : theory ; cosmology : cosmic microwave background ; cosmology : large-scale structure of Universe
刊名: ASTRONOMY & ASTROPHYSICS
发表日期: 2004-08-01
DOI: 10.1051/0004-6361:20040167
卷: 423, 期:1, 页:21-26
收录类别: SCI
英文摘要: Using a purely analytic approach to gaseous and dark matter halos, we study the cross-correlation between the Sunyaev-Zel'dovich (SZ) sky and galaxy surveys under flat sky approximation, in an attempt to acquire the redshift information of the SZ map. The problem can be greatly simplified. when it is noticed that the signals of the SZ-galaxy correlation arise only from hot gas and galaxies inside the same massive halos (i.e. clusters), and that field galaxies make almost no contribution to the cross-correlation. Under the assumption that both the hot gas and galaxies trace the common gravitational potential of dark halos. we calculate the expected cross SZ-galaxy power spectra for the WMAP/Planck SZ maps and the SDSS galaxy sample at small scales 100 < l < 1000. It turns out, however, that it is not presently feasible to measure such small angular cross power spectra because of the high noise levels at l > 400 in the WMAP/Planck experiments. Future SZ observations with better angular resolutions and sufficiently wide sky coverage will be needed if this technique is to be applied for the statistical measurement of the redshift distribution of the SZ sources.
语种: 英语
WOS记录号: WOS:000223473000004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bao.ac.cn/handle/114a11/8111
Appears in Collections:星系宇宙学研究部_期刊论文

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作者单位: Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

Recommended Citation:
Qu, Y,Wu, XP. A halo approach to the evaluation of the cross-correlation between the SZ sky and galaxy surveys[J]. ASTRONOMY & ASTROPHYSICS,2004,423(1):21-26.
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