Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337..209w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 1, 1989, p. 209-229. Research supported by NASA.
Astronomy and Astrophysics
Astronomy
37
Galactic Nuclei, Infrared Sources (Astronomy), Interstellar Matter, Radio Galaxies, Star Formation, Elliptical Galaxies, Far Infrared Radiation, Radio Emission, Spiral Galaxies
Scientific paper
The relationship between the IR and radio luminosity in early-type galaxies is examined using the correlation among spiral galaxies as a diagnostic of the presence of star formation. For ellipticals, the presence of long-wavelength IR emission enhances the probability that the galaxy is a radio source and is also correlated with the strength of that source. These findings are consistent with the idea that active radio nuclei are due to black holes being fueled by accretion of gas. The majority of S0s detected in both radio and far-IR have a similar ratio of IR to radio luminosity as has been found in spirals, and which is considered to be indicative of recent star formation. Sensitive radio limits for several galaxies reveal another substantial population of S0s with moderately strong IR emission unaccompanied by radio power.
Kim Dae Wook
Knapp Gillan R.
Walsh E. P. D.
Wrobel Joan M.
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