Mathematics – Logic
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001asthe..94..344h&link_type=abstract
The Astronomical Herald (ISSN 0374-2466), Vol. 94, No. 8, p. 344 - 352 (2001)
Mathematics
Logic
Galaxies, Dust Content, Cosmology
Scientific paper
This century will begin with progresses in far-infrared observations, which contribute to revealing the star formation history of the Universe. We must make clear the evolution of the amount of dust, the source of the far-infrared emission. We construct an evolution model of dust content in a galaxy by extending a standard chemical evolution model. As a result, we find that two processes should be taken into account for dust increase; supply from stars, and growth in interstellar clouds. These two are indispensable to explain the observed relation between dust-to-gas ratio and metallicity of nearby galaxies. Our model is useful in estimating the evolution of dust content on a cosmological timescale, and is important for revealing the star formation histories of the Universe from the ASTRO-F all-sky survey.
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