Heating of the cool dust in spiral galaxies and the far-infrared/radio correlation

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/185885· OSTI ID:6104377

Xu, Cong ^[1]

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1. Max-Planck-Institut fuer Radioastronomie, Bonn (Germany, F.R.)

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. 28 refs.

• OSTI ID: 6104377
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 365; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
CONFIGURATION
CORRELATIONS
COSMIC DUST
COSMIC RADIATION
COSMIC RADIO SOURCES
DUSTS
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
GALAXIES
HEATING
INFRARED RADIATION
INTERSTELLAR SPACE
IONIZING RADIATIONS
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
RADIO GALAXIES
RADIOWAVE RADIATION
SPACE
SPIRAL CONFIGURATION
STAR EVOLUTION
ULTRAVIOLET RADIATION