Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203..253k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 203, Apr. 1983, p. 253-263.
Astronomy and Astrophysics
Astronomy
22
Galactic Clusters, Interstellar Gas, X Ray Astronomy, Continuous Spectra, Electron Density Profiles, Gas Density, Heao 2, Spatial Distribution, Temperature Distribution
Scientific paper
X-ray observations of the Horologium supercluster are examined. Results show that the optically Coma-like cluster CA 0340-538 has a smooth X-ray structure which also resembles that of Coma. The density structure of its X-ray emitting gas, determined in a model-independent way, is found to be remarkably featureless, being consistent with a nearly isothermal polytrope out to approximately 2 Mpc from the cluster center. The total mass of the gas is determined to exceed 10% of the cluster virial mass and may contribute a substantial fraction of the cluster binding mass. Although CA 0329-527 is found to be an X-ray double cluster, its structure appears to be confused. CA 0325-539 is found to show no substantial X-ray emission. An upper limit of 1.3 x 10 to the 44th erg/s is determined for any diffuse 2-10 keV emission from the Horologium supercluster.
Abramopoulos F.
Chincarini Guido L.
Fabian Andrea C.
Ku William H.-M.
Nulsen Paul E. J.
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