Very small particles in spiral galaxies

Ghosh, S. K. ; Drapatz, S. ; Peppel, U. C. (1986) Very small particles in spiral galaxies Astronomy and Astrophysics, 167 . pp. 341-350. ISSN 0004-6361

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The existence of a hot component of very small dust particles in normal spiral galaxies has been inferred from a statistical study of their infrared emission as measured by IRAS. Our galaxy has been demonstrated to be a typical spiral and is used to investigate various emission sources for mid-infrared radiation. Young and evolved discrete objects are shown to be of minor importance. Rather, evidence is presented for the diffuse nature of the mid-infrared radiation of galaxies. A fairly quantitative treatment of the emission process leads to the observed quantities.

Item Type:Article
Source:Copyright of this article belongs to EDP Sciences.
Keywords:Interstellar Dust; Spiral Galaxies; Mid-Infrared Emission; H II Regions; IRAS
ID Code:97149
Deposited On:23 Jan 2013 09:26
Last Modified:19 May 2016 09:21

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