Dust in Galaxies
The past decade has heralded a revolution in our understanding of dust in galaxies due largely to the extraordinary success of the Infrared Astronomical Satellite (IRAS). The satellite, launched in 1983, surveyed 96% of the sky yielding continuum flux measurements at 12, 25, 60 and 100μm for literally thousands of galaxies (Cataloged Galaxies & Quasars in the IRAS Survey 1985). Complimentary 60, 100 and 160μm observations have also been obtained for a limited number of galaxies with the Kuiper Airborne Observatory (KAO). The past decade has also witnessed a dramatic development in the field of submillimeter astronomy with the commissioning of several new submillimeter telescopes including the JCMT, CSO, IRAM and SEST, all of which have yielded new results on the 300 to 1300μm continuum emission from galaxies. The goal of this review is to discuss the new observations within the context of the origin of the far infrared luminosity, the temperature of dust in galaxies and the implications of the new data for the opacity of spiral galaxy disks.
KeywordsMassive Star Spiral Galaxy Dust Mass Dust Temperature High Mass Star
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