Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-09-03
Publ.Astron.Soc.Pac.113:1449-1485,2001
Astronomy and Astrophysics
Astrophysics
Invited Review for PASP, to appear in December 2001. 84 pages, including 6 tables and 11 embedded figures; uses AAS Latex macr
Scientific paper
10.1086/324269
Presence of dust in galaxies removes half or more of the stellar energy from the UV-optical budget of the Universe and has profound impact on our understanding of how galaxies evolve. Measures of opacity in local galaxies are reviewed together with widely used theoretical and empirical methods for quantifying its effects. Existing evidence shows that the dust content of nearby galaxies depends not only on their morphology, but also on their luminosity and activity level. A digression is devoted to starbursts in view of their potential relevance for measures of opacity in distant galaxies. Scarcity of coherent multiwavelength datasets hampers our ability to derive reliable obscuration estimates in intermediate and high redshift galaxies. This, in turn, limits the reliability of inferred physical quantities, such as star formation rates, stellar population ages, galaxy luminosity functions, and others.
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