Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..263c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 200, July 1982, p. 263-270.
Astronomy and Astrophysics
Astronomy
20
Astronomical Spectroscopy, Galactic Radiation, Heao 2, Radiant Flux Density, Spaceborne Astronomy, X Ray Sources, Brightness Distribution, Emission Spectra, Globular Clusters, Heao 1, Line Spectra, Luminosity, Proportional Counters, Spiral Galaxies, Starburst Galaxies
Scientific paper
Four distinct X-ray sources have been detected by the Einstein Observatory imaging proportional counter in the 2A2315-428 field. The strongest source in the 0.2-3.8 keV band is associated with the Sersic 159-03 cluster, which contains a cD galaxy, and may account for as much as 40% of the observed 2A flux. The rest of the flux is suspected to issue from the weaker but more heavily cut-off galaxy NGC 7582. It is suggested that such a large X-ray absorption column density in NGC 7582 may account for the absence of a broad H-alpha emission component, as has been observed in other narrow-line X-ray galaxies. The weak X-ray flux from NGC 7552 shows together with a reanalysis of previous observations, that the source is not variable, that its X-ray emission is not likely to result from a compact nucleus, and that it may be a starburst galaxy.
Charles Phil A.
Phillips Marcia
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