Extragalactic dust. III - The extinction law in three southern galaxies

Details Extragalactic dust. III - The extinction law in three southern galaxies Extragalactic dust. III - The extinction law in three southern galaxies

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..341b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 2, July 1990, p. 341-347.

Astronomy and Astrophysics

Astrophysics

10

Astronomical Photometry, Cosmic Dust, Galactic Evolution, Interstellar Extinction, Interstellar Matter, Far Infrared Radiation, Hydrogen, Ultraviolet Radiation

Scientific paper

The wavelength dependence of the extinction by dust in three southern galaxies is investigated. The wavelength dependence in the UV relative to the blue is steeper than the typical Galactic extinction law. Similar findings for other galaxies were interpreted as indicating smaller sizes of the 'large' grains responsible for the extinction of light in the optical spectrum when compared with typical Galactic dust. Effects which may modify the observed extinction, other than the dust itself, are ruled out.

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