PMO OpenIR  > 南极天文中心
Kinetic Sunyaev-Zel'dovich tomography with spectroscopic redshift surveys
Shao, Jiawei1,2; Zhang, Pengjie1; Lin, Weipeng1; Jing, Yipeng1; Pan, Jun3
2011-05-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume413Issue:1Pages:628-642
AbstractThe kinetic Sunyaev-Zel'dovich (kSZ) effect is potentially a powerful tool that can be used to search for missing baryons. However, the kSZ signal is overwhelmed by various contaminations and the cosmological application is hampered by the loss of redshift information as a result of the projection effect. We propose a kSZ tomography method to alleviate these problems, with the aid of galaxy spectroscopic redshift surveys. We propose to estimate the large-scale peculiar velocity through the three-dimensional (3D) galaxy distribution, to weigh it using the 3D galaxy density and to adopt the product projected along the line of sight with a proper weighting as an estimator of the true kSZ temperature fluctuation Theta. Because the underlying directional dependence in the estimator closely resembles that in the true kSZ signal Theta, is tightly correlated with Theta. Thus, it avoids the problem of null correlation between the galaxy density and Theta, which prohibits the kSZ extraction through the usual density-cosmic microwave background (CMB) two-point cross-correlation measurement. Thus, we propose to measure the kSZ signal through the cross-correlation. This approach has a number of advantages. (i) Because of the underlying directional dependence of , it is uncorrelated with the primary CMB, the thermal SZ effect and astrophysical contaminations, such as dusty star-forming galaxies. Thus, the cross-correlation picks up the kSZ signal in the SZ survey in a clean manner. (ii) With the aid of galaxy redshifts, the cross-correlation recovers the redshift information of the kSZ signal and allows for a more detailed investigation of missing baryons. (iii) As galaxy surveys usually have a high signal-to-noise (S/N) ratio, the S/N ratio of the kSZ measurement through the cross-correlation can be significantly improved.
KeywordCosmic Background Radiation Cosmology: Observations Large-scale Structure Of Universe
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1111/j.1365-2966.2011.18166.x
WOS KeywordHOT INTERGALACTIC MEDIUM ; BARYONS ; REIONIZATION ; GALAXIES ; POWER ; FLUCTUATIONS ; SIMULATIONS ; CLUSTERS ; UNIVERSE ; MATTER
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000289525000046
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4471
Collection南极天文中心
Affiliation1.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
3.Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Shao, Jiawei,Zhang, Pengjie,Lin, Weipeng,et al. Kinetic Sunyaev-Zel'dovich tomography with spectroscopic redshift surveys[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,413(1):628-642.
APA Shao, Jiawei,Zhang, Pengjie,Lin, Weipeng,Jing, Yipeng,&Pan, Jun.(2011).Kinetic Sunyaev-Zel'dovich tomography with spectroscopic redshift surveys.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,413(1),628-642.
MLA Shao, Jiawei,et al."Kinetic Sunyaev-Zel'dovich tomography with spectroscopic redshift surveys".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 413.1(2011):628-642.
Files in This Item:
File Name/Size DocType Version Access License
2011050Kinetic Sunya(1251KB) 开放获取LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Shao, Jiawei]'s Articles
[Zhang, Pengjie]'s Articles
[Lin, Weipeng]'s Articles
Baidu academic
Similar articles in Baidu academic
[Shao, Jiawei]'s Articles
[Zhang, Pengjie]'s Articles
[Lin, Weipeng]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Shao, Jiawei]'s Articles
[Zhang, Pengjie]'s Articles
[Lin, Weipeng]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2011050Kinetic Sunyaev-Zel'dovich tomography with spectroscopic redshift surveys .pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.