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The surface brightness of IRAS galaxies

Davies, Jonathan Ivor, Phillipps, S. and Disney, Michael John 1989. The surface brightness of IRAS galaxies. Astrophysics and Space Science 157 (1-2) , pp. 299-303. 10.1007/BF00637344

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Using IRAS measurements, we find positive correlations between both the infrared to optical flux ratio (L FIR/L B) and infrared colour temperature (L 60/L 100) with optical surface brightness. These correlations can be understood by high surface brightness galaxies having (i) a high star formation rate, or (ii) a high-space density of stars and dust. In an attempt to interpret (ii) above, we have produced radiative transfer models for the dust absorption in a galactic disc. These models indicate that the highest surface brightness galaxies may be the most dust obscured (i.e., optically thick) and that the total luminosity (and, hence, mass) of these galaxies may be considerably underestimated.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Springer Verlag
ISSN: 0004-640X
Last Modified: 04 Jun 2017 04:27

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