Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246..231s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. 231-242.
Astronomy and Astrophysics
Astronomy
91
Cosmic Dust, Interstellar Extinction, Interstellar Gas, Magellanic Clouds, Emission Spectra, Infrared Astronomy Satellite, Infrared Cirrus (Astronomy), Interstellar Matter
Scientific paper
The large-scale distributions of Galactic infrared and H I emission toward the Magellanic Clouds were compared, resulting in estimates of the infrared foreground of the Clouds. The Galactic gas-to-dust ratio by mass was found to be 420 (+250, -120) is found. From H I maps, maps were derived of the Galactic foreground color excess toward the Magellanic Clouds on scales of 48 arcmin. Over the LMC surface, the foreground reddening is not constant; it ranges from E(B - V) = 0.07 to 0.17 mag. For the SMC, a foreground reddening E(B - V) = 0.07 to 0.09 mag is found. The amplitude of foreground reddening variations is probably much greater on smaller scales. Toward the 30 Doradus region, the mean foreground reddening is quite low. As a result, differences between the 30 Doradus and the average LMC extinction curves are much less than previously suggested.
Israel Frank P.
Schwering Piet B. W.
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