Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...190...47k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 190, no. 1-2, Jan. 1988, p. 47-51.
Astronomy and Astrophysics
Astronomy
30
Active Galaxies, Markarian Galaxies, Millimeter Waves, Radio Astronomy, Continuous Radiation, H Ii Regions, Seyfert Galaxies, Star Formation, Starburst Galaxies
Scientific paper
The authors have detected 1.3 mm continuum radiation at the 10 mJy level from Markarian galaxies. From the relation between gas mass Mg and luminosity L found in this and in two preceding papers they draw the following conclusions: The star formation rate per unit gas mass is similar in individual H II regions as well as in nonactive (spiral) galaxies, irrespective of the luminosity. Markarian galaxies, which comprise a variety of activity types including Seyferts, are also powered by star formation, but with a very enhanced efficiency. Nonthermal point sources in such galaxies can therefore only be a byproduct, but not the cause of the activity. The large fraction of isolated active systems suggests that merging of galaxies cannot be the only reason for activity. Alternative scenarios are discussed.
Chini Rolf
Kreysa Ernst
Kruegel Endrick
Sherwood W. A.
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