Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...184.4907f&link_type=abstract
American Astronomical Society, 184th AAS Meeting, #49.07; Bulletin of the American Astronomical Society, Vol. 26, p.942
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of the ROSAT PSPC X-ray observations of NGC 4125 and NGC 3610. These two galaxies are among the best representatives of a newly recognized class of elliptical galaxies that may be the product of recent mergers. NGC 4125 shows two plumes or disks crossing at right angles; NGC 3610 has the richest fine structure of all ellipticals catalogued by Schweizer and Seitzer. Our X-ray observations show that these galaxies do not retain large gaseous halos, contrary to the suggested link between merging and X-ray brightness. Their X-ray to optical ratios are in the range of those of X-ray faint ellipticals, consistent with the value found for the bulge of M31, where the X-ray emission is dominated by low-mass binaries. Their X-ray spectra are also comparable with those of X-ray faint ellipticals and suggest the presence of at least two distinct emission components.
Fabbiano Giuseppina
Schweizer Francois
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