Extent of hot intergalactic gas in the cluster Abell 2218

Details Extent of hot intergalactic gas in the cluster Abell 2218 Extent of hot intergalactic gas in the cluster Abell 2218

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.275...40b&link_type=abstract

Nature, vol. 275, Sept. 7, 1978, p. 40,41.

Computer Science

19

Abundance, Cosmic Gases, Galactic Clusters, Intergalactic Media, Compton Effect, Galactic Nuclei, Microwave Emission, Photons, Star Distribution, Temperature Profiles

Scientific paper

Measurements February 1977-May 1978 of the microwave background temperature in the vicinity of the cluster Abell 2218 are interpreted. The new observations in several different directions confirm the earlier finding of a small cooling towards the cluster center. The data are consistent with an extended adiabatic atmosphere with polytropic index equal to 5/3 and a cluster filling factor equal to -0.15; according to this model, the source is convolved to the beam and parameterized by a constant temperature decrement.

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