Distortions of the CMB spectrum by distant clusters of galaxies

Details Distortions of the CMB spectrum by distant clusters of galaxies Distortions of the CMB spectrum by distant clusters of galaxies

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245l..21c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 245, no. 2, May 1991, p. L21-L24. Research supported by Ministero dell'Univers

Mathematics

Logic

15

Background Radiation, Cosmology, Galactic Clusters, Microwave Spectra, Cosmic Plasma, Intergalactic Media

Scientific paper

The distribution in cosmic depth of clusters and groups of galaxies can be probed by means of the Sunyaev-Zel'dovich effect from the associated intracluster plasma. The average spectral distortions predicted, from observations of individual clusters, by representative cosmogonies are computed and discussed within the framework provided by the current generation of space instrumentation. The apparent diminution of the cosmic microwave background temperature in the Rayleigh-Jeans region caused by clusters uniformly distributed out to a redshift, and the apparent diminution after hierarchical clustering are illustrated. It is suggested that ignificant observational bounds to the cluster age may be within the reach of COBE.

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