Cosmological constraints from the observed angular cross-power spectrum between Sunyaev-Zel'dovich and X-ray surveys-猫眼课题宝

Sunyaev-Zeldovich 和 X 射线巡天观测到的角交叉功率谱的宇宙学约束

DOI：

10.1051/0004-6361/201425555

发表时间：

2015

期刊：

Astronomy and Astrophysics

影响因子：

6.5

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

作者：

G. Hurier;M. Douspis;N. Aghanim;E. Pointecouteau;J. Diego;J. Macías

我们首次探测到了太阳热效应(TSZ)和全天X射线辐射之间的互相关角功率谱。Tsz效应和X射线是由星系群和星系团内相同的热气产生的，这在它们之间产生了天然的强相关性，可以用来增强联合信号和得出宇宙学参数。我们计算了在0.52keV能带内的ROSAT全天巡天与由6张普朗克全天频率图重建的70~545GHz−的Tsz效应之间的相关性。我们在大范围的角度尺度上检测到了显著的相关性。在50&lt；�&lt；2000范围内，探测到X射线与TSZ的交叉相关，总体意义为28σ。作为我们系统研究的一部分，我们对活动星系核污染以及宇宙红外背景与X射线之间的相关性进行了多频率模拟。利用互相关信号对功率谱幅值的强烈依赖性，我们约束σ8=0.804±0.037，其中建模不确定性主导统计和系统不确定性。我们还得到了晕质量与X射线光度、L500−M500、SZ信号、Y500−M500、Asz+ax=3.37±0.09标度关系的质量指数和超红移演化指数βsz+βx=0.4+0.4−0.5的约束条件。

We present the first detection of the cross-correlation angular power spectrum between the thermal Sunyaev-Zel’dovich (tSZ) effect and the X-ray emission over the full sky. The tSZ effect and X-rays are produced by the same hot gas within groups and clusters of galaxies, which creates a naturally strong correlation between them that can be used to boost the joint signal and derive cosmological parameters. We computed the correlation between the ROSAT All Sky Survey in the 0.5−2 keV energy band and the tSZ effect reconstructed from six Planck all-sky frequency maps between 70 and 545 GHz. We detect a significant correlation over a wide range of angular scales. In the range 50 <�< 2000, the cross-correlation of X-rays to tSZ is detected at an overall significance of 28σ .A s part of our systematic study, we performed a multi-frequency modelling of the AGN contamination and the correlation between cosmic infra-red background and X-rays. Taking advantage of the strong dependence of the cross-correlation signal on the amplitude of the power spectrum, we constrained σ8 = 0.804 ± 0.037, where modelling uncertainties dominate statistical and systematic uncertainties. We also derived constraints on the mass indices of scaling relations between the halo mass and X-ray luminosity, L500−M500 ,a nd SZ signal, Y500−M500, asz + ax = 3.37 ± 0.09, and on the indices of the extra-redshift evolution, βsz + βx = 0.4 +0.4 −0.5 .

COSMOLOGICAL CONSTRAINTS FROM SUNYAEV–ZEL'DOVICH-SELECTED CLUSTERS WITH X-RAY OBSERVATIONS IN THE FIRST 178 deg2 OF THE SOUTH POLE TELESCOPE SURVEY

南极望远镜巡天第一个 178 度2 的 X 射线观测中 SUNYAEVâZELDovich 选定星团的宇宙学约束

DOI： 10.1088/0004-637x/763/2/147

发表时间： 2013

期刊：

The Astrophysical Journal

影响因子： --

作者：

B. A. Benson

通讯作者：

B. A. Benson

GALAXY CLUSTERS SELECTED WITH THE SUNYAEV–ZEL'DOVICH EFFECT FROM 2008 SOUTH POLE TELESCOPE OBSERVATIONS

DOI： 10.1088/0004-637x/722/2/1180

发表时间： 2010-03

期刊：

The Astrophysical Journal

影响因子： --

作者：

F. W. High;B. Stalder;J. Song;P. Ade;K. Aird;S. Allam;R. Armstrong;W. Barkhouse;B. Benson;B. Benson;E. Bertin;Suman Bhattacharya;L. Bleem;M. Brodwin;E. Buckley-Geer;J. Carlstrom;P. Challis;C. Chang;T. Crawford;A. Crites;T. Haan;S. Desai;M. Dobbs;J. Dudley;R. Foley;E. George;M. Gladders;N. Halverson;M. Hamuy;S. Hansen;G. Holder;W. Holzapfel;J. Hrubeš;M. Joy;R. Keisler;Adrian T. Lee;Adrian T. Lee;E. Leitch;Huan Lin;Yen-Ting Lin;A. Loehr;M. Lueker;D. Marrone;J. McMahon;J. McMahon;J. Mehl;S. Meyer;J. J. Mohr-J.;T. Montroy;N. Morell;C. Ngeow;S. Padin;T. Plagge;T. Plagge;C. Pryke;C. Reichardt;A. Rest;J. Ruel;J. Ruhl;K. Schaffer;L. Shaw;L. Shaw;E. Shirokoff;R. C. Smith;H. Spieler;Z. Staniszewski;A. Stark;C. Stubbs;D. Tucker;K. Vanderlinde;J. Vieira;R. Williamson;W. M. Wood-Vasey;Y. Yang;O. Zahn;A. Zenteno

通讯作者：

SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: COSMOLOGICAL INTERPRETATION

DOI： 10.1088/0067-0049/192/2/18

发表时间： 2011-02-01

期刊：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES

影响因子： 8.7

作者：

Komatsu, E.;Smith, K. M.;Wright, E. L.

通讯作者：

Wright, E. L.

Cosmological constraints from the observed angular cross-power spectrum between Sunyaev-Zel'dovich and X-ray surveys

Sunyaev-Zeldovich 和 X 射线巡天观测到的角交叉功率谱的宇宙学约束

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