Very small particles in spiral galaxies

Details Very small particles in spiral galaxies Very small particles in spiral galaxies

Publishing date

Oct 1986

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167..341g&link_type=abstract

Journals

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, Oct. 1986, p. 341-350.

Science

Astronomy and Astrophysics

Field

Astronomy

Additional info 2

17

Additional info 3

Cosmic Dust, Infrared Sources (Astronomy), Interstellar Matter, Spiral Galaxies, Point Sources, Star Formation, Stellar Envelopes

Type

Scientific paper

Abstract

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.

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