Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365l..47x&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 365, Dec. 20, 1990, p. L47-L50.
Astronomy and Astrophysics
Astrophysics
39
Far Infrared Radiation, Interstellar Matter, Radio Galaxies, Spiral Galaxies, Data Correlation, Interstellar Extinction, Star Formation Rate, Ultraviolet Radiation
Scientific paper
The heating of cool dust by nonionizing UV radiation is studied in a sample of 39 normal spirals. It is found that the contribution of the UV heating to the cool FIR luminosity can on average account for 76 percent of the radiation in the wavelength range 40-120 micron from the cool dust. It is concluded from this and additional findings that the heating of the cool dust within the disks of normal spirals is mainly due to the UV interstellar radiation field. The results mean that the very tight and universal correlation between the FIR and the radio continuum luminosities of spiral galaxies can be easily understood if the hypothesis is accepted that cosmic-ray particles are predominantly accelerated by SNe and their remnants.
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