Extreme starburst or central activity in X-ray luminous IRAS galaxies

Details Extreme starburst or central activity in X-ray luminous IRAS galaxies Extreme starburst or central activity in X-ray luminous IRAS galaxies

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..287b&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)287-(12)2904

Astronomy and Astrophysics

Astronomy

Active Galactic Nuclei, H Ii Regions, Luminosity, Seyfert Galaxies, Starburst Galaxies, X Ray Astronomy, Heao 2, Infrared Astronomy, Infrared Astronomy Satellite, O Stars, Rosat Mission, Sky Surveys (Astronomy), Supernova Remnants, X Ray Binaries

Scientific paper

ROSAT All Sky Survey observations of IRAS galaxies have revealed up to now a number of 10 optically non-Seyfert galaxies with X-ray (0.1-2.4) luminosities up to a few 1043erg/s (Boller et al. 1992). The sources are brighter than previous detection limits of a few 1041erg/s as found by Stocke et al. (1991) or Green, Anderson and Ward (1992) for Einstein (HEAO 2) sources. The optical classification is based on follow-up observations which indicate clearly the non-Seyfert (LINER and HII region-like galaxies) nature. Our investigations reveal that galaxies classified as non-Seyferts on the basis of optical spectroscopy may reach exceptionally high X-ray luminosities which are similar to that of Seyfert galaxies. On the basis of the present observational material we suppose a hidden low-luminosity active galactic nucleus (AGN) in the center of these objects as the source of energy production. The objects are of interest when evaluating starburst versus central activity.

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