Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...266..177c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 266, no. 1, p. 177-182.
Astronomy and Astrophysics
Astrophysics
22
Markarian Galaxies, Star Formation, Astronomical Catalogs, Cosmic Dust, Luminosity, Mass To Light Ratios, Star Formation Rate
Scientific paper
The study presents new 1300-micron observations towards 24 Mkn galaxies from the IRAS Catalog, which increase the total number of objects with 1300-micron fluxes and IRAS data to 46 and almost complete the data for a sample of active galaxies from the Markarian Catalog. Physical properties for 46 objects are derived from the coldest dust component. In the wavelength range from 60 to 1300 microns their average dust color temperature is 33 +/- 5 K and the wavelength dependence of dust opacity is 1.9 +/- 0.3. The ratio of IR luminosity over gas mass, which is a measure for star formation efficiency, is 103 +/- 59. A study of the radial distribution of the dust indicates that the major fraction of interstellar dust is concentrated within a galactocentric radius of 3 kpc. In Seyfert galaxies LIR/Mgas is a factor of two lower than in comparable star burst galaxies.
Chini Rolf
Kreysa Ernst
Kruegel Endrick
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