COBE ANISOTROPY FROM SUPERCLUSTER GAS

被引：23

作者：

HOGAN, CJ ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 398卷 / 02期

关键词：

COSMIC MICROWAVE BACKGROUND; COSMOLOGY; THEORY;

D O I：

10.1086/186581

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is suggested that the microwave background anisotropy detected by the COBE DMR might be dominated not by the direct gravitational effect of primordial fluctuations in the last scattering surface, but by scattering off of moving electrons in optically thin, nearby superclusters. Hot diffuse clouds of ionized gas created during supercluster collapse produce Sunyaev-Zel'dovich and Doppler background anisotropy whose properties may closely mimic those of primordial anisotropy in current data. Strategies for and difficulties in separating the effects are discussed, based on the anisotropy spectrum, autocorrelation, correlation with galaxy catalogs, X-ray emission, and integrated spectral distortions.

引用

页码：L77 / L80

页数：4

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