Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376...95c&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 376, July 20, 1991, p. 95-103. NASA IRAS Extended Mission Program-supported
Astronomy and Astrophysics
Astronomy
202
Astronomical Photometry, Far Infrared Radiation, Galactic Radiation, Radio Sources (Astronomy), Spiral Galaxies, Brightness Distribution, Correlation, Infrared Astronomy Satellite, Radiant Flux Density
Scientific paper
FIR-radio luminosity correlations are presently derived for two statistically complete samples spanning a wide luminosity range. While observed correlations are tight, they are not linear; the observed scattering is mostly intrinsic. An empirical correction to the radio luminosities, based on observed blue luminosities, makes the corrected FIR-radio correlation linear and eliminates most of the residual variance. A two-component model that is consistent with the improved correlation is proposed for the heating luminosity within galaxies. The first, radio-loud component contains young massive stars that heat the dust, while contributing to the cool cirrus dust-heating interstellar radiation field. The second, radio-quiet component is made up of less massive older stars.
Anderson Megan L.
Condon James J.
Helou George
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