Mathematics – Logic
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..392g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 15, 1991, p. 392-401. Research supported by CN
Mathematics
Logic
7
Active Galactic Nuclei, Galactic Radiation, Seyfert Galaxies, Spiral Galaxies, X Ray Sources, Emission Spectra, H Alpha Line, Interacting Galaxies, Peculiar Galaxies, Statistical Analysis
Scientific paper
A statistical analysis of the soft X-ray emission from spiral galaxies with normal and low-luminosity active nuclei (LINERs and Seyfert 2) - derived from published observations obtained with the Einstein Observatory - has revealed a number of previously unrecognized characteristics of the X-ray emission. Seyfert 2 galaxies (the least powerful X-ray sources of the Seyfert class) turn out to be, on average, stronger X-ray emitters (per unit light) than non-Seyfert galaxies, whereas galaxies with LINER nuclei and H II-region-like nuclei exhibit X-ray emissions of comparable strength. It has been verified that the X-ray luminosity (per unit light) is linked to the total H-alpha emission-line strength. Remarkably, more enhanced X-ray emission (per unit light) has been found in Arp atlas galaxies, in galaxies included in the Atlas and Catalogue of Interacting Galaxies of Vorontsov-Vel'yaminov, and in interacting galaxies compared to normal galaxies.
Bertotti Giorgio
Giuricin Giuliano
Mardirossian Fabio
Mezzetti Marino
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