Absorption features in the 3 micron spectra of protostars

Details Absorption features in the 3 micron spectra of protostars Absorption features in the 3 micron spectra of protostars

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...344..413s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 344, Sept. 1, 1989, p. 413-426.

Other

184

Absorption Spectra, Infrared Spectra, Interstellar Matter, Protostars, Stellar Spectra, Ice, Interstellar Chemistry, Interstellar Extinction, Molecular Clouds

Scientific paper

Low-resolution spectra have been obtained for a selection of infrared protostars and one object located behind the Taurus dark cloud. Most of the differences in the spectra can be attributed to different H2O ice temperatures combined with additional broad absorption between 3.3 and 3.5 microns plus another absorption in the 2.8-2.9 micron range. An NH3-H2O ice mixture, scattering by H2O ice-coated grains, and hydrated silicates are ruled out as explanations for the last type of absorption. The most plausible explanation is still some form of hydrocarbon in the grain mantles.

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