NASA/IPAC EXTRAGALACTIC DATABASE
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For refcode 1991MNRAS.250..392G:
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Copyright by Royal Astronomical Society. 1991MNRAS.250..392G X-ray emission from spiral galaxies with normal and low-activity nuclei G. Giuricin, G. Bertotti, F. Mardirossian and M. Mezzetti Dipartimento di Astronomia, Universita di Trieste, via G.B. Tiepolo 11-34131 Trieste, Italy Centro Interuniversitario Regionale per l'Astrojlsica e la Cosmologia (CIRAC), Strada Costiera 11-34014 Trieste, Italy Centre for Advanced Research in Space Optics, Padriciano 99, Trieste, Italy Accepted 1991 January 3. Received 1990 October 23 SUMMARY 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. We have 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.
Retrieve 104 NED objects in this reference.
Please click here for ADS abstract

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