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I. M. Vargas (University of Puerto Rico), C. Jones (Harvard-Smithsonian Center for Astrophysics)
A sample of 19 early-type galaxies from the O'Sullivan catalogue was selected and further categorized according to velocity dispersion values and the extent of their X-ray emission using data from the radial emission distribution profiles. Galaxies were grouped according to velocity dispersion values ranging from 54 km/s to 300 km/s and observed extended emissions in the range of 7-340 arcseconds. Data from the observations were processed and spectra were fitted by XSPEC. Fluxes, as well as other figures of merit such as temperatures and luminosities, were obtained for all objects. It was determined that the observed X-ray extended emission in the low-luminosity early-type galaxies of our sample is on the scale of a few kiloparsecs and appears to be dominated, in general, by a gas component rather than by unresolved point sources.
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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.