Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..247k&link_type=abstract
Astronomy and Astrophysics, vol. 107, no. 2, Mar. 1982, p. 247-251.
Astronomy and Astrophysics
Astronomy
181
Interstellar Extinction, Interstellar Gas, Lyman Alpha Radiation, Magellanic Clouds, Near Infrared Radiation, Spectral Line Width, Cosmic Dust, Infrared Absorption, Infrared Astronomy, Infrared Photometry, Iue
Scientific paper
The interstellar Lyman-alpha absorption-profile in the LMC is presented to show that the gas-to-color excess ratio in the LMC is approximately four times larger than the Galactic value. The gas to dust ratio in the LMC derived from the profile is N(H I)/E(B-V) = 2 x 10 to the 22nd atoms/sq cm/mag, and near infrared photometry in the J, H and K bands of the early-type supergiants used for the profile is used to check if this dust deficiency can be explained by an anomalous large grain size distribution. It is found that the near infrared reddening law in the LMC is similar to the Galactic law, and thus the high gas to dust ratio should still hold if expressed as a ratio by mass.
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