Other
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...341l..87g&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 341, June 15, 1989, p. L87-L90.
Other
17
Absorption Spectra, Infrared Absorption, Infrared Spectra, Interstellar Chemistry, Interstellar Matter, Cosmic Dust, Ice, Molecular Ions, Photolysis, Protostars
Scientific paper
The 6.86-micron absorption in W33A has been investigated using the results of laboratory experiments simulating the photochemistry of interstellar grain mantles. The 5-8-micron IR spectrum, and particularly the 6.86-micron absorption, of W33A can be reproduced with ultraviolet irradiated water-rich ices. The 5-8-micron spectrum of W33A exhibits effects which are interpreted as due to dust material heated to different temperatures along the line of sight. Photolyzed dust mantles with a temperature less than 100 K provide the 6.0-micron absorption, while dust mantles heated to more than 100 K are the main contributors to the 6.86-micron absorption feature. Different photolysis and heating scenarios, as well as line of sight effects, are required to account for the 5-8-micron spectra of other protostellar objects.
Greenberg Mayo J.
Grim Ruud J. A.
Schmitt Bernard
Schutte Willem A.
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