COBE anisotropy from supercluster gas

Details COBE anisotropy from supercluster gas COBE anisotropy from supercluster gas

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...398l..77h&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 398, no. 2, p. L77-L80.

Astronomy and Astrophysics

Astrophysics

23

Astronomical Catalogs, Cosmic Background Explorer Satellite, Relic Radiation, Anisotropy, Autocorrelation, Doppler Effect, Electron Scattering, X Ray Sources

Scientific paper

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.

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