Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.197..571b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 197, Nov. 1981, p. 571-592.
Astronomy and Astrophysics
Astronomy
36
Background Radiation, Galactic Clusters, Galactic Radiation, Gas Composition, X Ray Sources, Astronomical Models, Galactic Structure, Gas Density, Gas Temperature, Microwaves, Radiant Flux Density
Scientific paper
The paper presents final results of a 4500-hour search for anisotropies in the microwave background radiation toward 15 clusters of galaxies. Significant depressions in the temperature of this radiation at 10.6 GHz were found in the directions of Abell 576 and 2218. The mean gas density and temperature at the cluster centers inferred from the data on a subset of the cluster sample are approximately 3 x 10 to the -24th kg/cu m and 3 x 10 to the 8th K, respectively. Scans across Abell 576 and 2218 provide measures of the distribution of the decrement, and a map of a reference patch of blank sky yields an estimate of the confusion level for these observations and a limit to the systematic error.
Birkinshaw Mark
Gull Stephen F.
Northover J. E. K.
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