Other
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..730m&link_type=abstract
Astrophysical Journal, Part 1, vol. 236, Mar. 15, 1980, p. 730-737. Research supported by the Science Research Council.
Other
31
Galactic Clusters, Heao 1, X Ray Sources, X Ray Spectra, Abundance, Compton Effect, Emission Spectra, Iron, K Lines, Red Shift
Scientific paper
X-ray spectral observations of two nearby low-luminosity clusters of galaxies are presented. For the Centaurus cluster an emission feature at 7.9 keV is detected at about one-third of the strength of the 6.7 keV line. This higher energy line represents K-beta emission from highly ionized iron. In addition, it is demonstrated that for neither the Centaurus nor the A1060 cluster can an isothermal model with an Fe emission line adequately fit the data. Instead, the simplest models which provide acceptable fits include a second, harder component which may be either a second exponential or a power law. The implications of the two-component nature of the continuum on the Fe abundance and the X-ray surface-brightness distribution are discussed.
Mitchell Richard
Mushotzky Richard
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