The X-ray spectra of clusters of galaxies and their relationship to other cluster properties

Details The X-ray spectra of clusters of galaxies and their relationship to other cluster properties The X-ray spectra of clusters of galaxies and their relationship to other cluster properties

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..329m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Nov. 1979, p. 329-361.

Astronomy and Astrophysics

Astronomy

55

Galactic Clusters, Satellite Observation, X Ray Astronomy, X Ray Spectra, Astronomical Spectroscopy, Bremsstrahlung, Data Processing, Emission Spectra, Graphs (Charts), Iron, Line Spectra, Radio Sources (Astronomy), Stellar Luminosity

Scientific paper

Observations with the MSSL proportional counter spectrometer on the Ariel 5 satellite of the X-ray spectra of 20 candidate clusters of galaxies are reported. The data are compared with the results from the OSO 8 satellite, and the combined sample of some 30 cluster X-ray spectra are analyzed. Generally larger values of X-ray luminosity than obtained by Uhuru or the SSI are found, which, because of the larger field of view, may indicate significant amounts of hot gas away from the cluster centers. The validity of all X-ray cluster identifications has been examined, and sources have been classified according to certainty of identification. The incidence of X-ray line emission from the clusters has been investigated, and temperatures derived on the basis of an isothermal model. Relationships between X-ray, optical, and radio properties of the clusters have been studied. The more massive, centrally condensed clusters generally contain higher-temperature gas and have a greater luminosity than the less massive, more irregular clusters.

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