Ions in grain mantles - The 4.62 micron absorption by OCN(-) in W33A

Details Ions in grain mantles - The 4.62 micron absorption by OCN(-) in W33A Ions in grain mantles - The 4.62 micron absorption by OCN(-) in W33A

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321l..91g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. L91-L96.

Other

98

Absorption Spectra, Interstellar Chemistry, Interstellar Matter, Molecular Ions, Molecular Spectra, Crystals, Cyanates, Infrared Spectra, Interstellar Radiation, Photolysis

Scientific paper

The 4.62-micron absorption feature in W33A has been uniquely identified with the presence of OCN(-) ions in grain mantles. An extensive experimental study of the peak position and absorption strength of this band produced by UV photolysis of various isotopically labeled ices provided the strict criteria needed to eliminate all conceivable molecular candidates other than the cyanate ion OCN(-). The experiments provide further proof for the UV photoprocessing of interstellar mantles, leading not only to the formation of radicals and more complex molecules but to molecular ions and salts as well. The presence of ions in the solid phase has significant implications for chemical reaction schemes in low-temperature solids and interpretations of interstellar absorption spectra.

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