Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366..192m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 366, Jan. 1, 1991, p. 192-197.
Astronomy and Astrophysics
Astronomy
24
Abundance, Hydrogen Sulfide, Nebulae, Star Formation, Stellar Composition, H Ii Regions, Infrared Sources (Astronomy), Interstellar Matter, Milky Way Galaxy, Molecular Clouds, Water Masers
Scientific paper
Interstellar H2S and its isotopic variant H2(S-34) have been observed toward several star-forming regions via their 1(10)-1(01) transitions at 2 mm, using the FCRAO telescope. In sources where both isotopic species were observed, column densities of about 10 to the 16th/sq cm were measured. Column density lower limits of about 10 to the 14th/sq cm for H2S were found for other sources, where only the main isotopic line was observed. The fractional abundances of H2S relative to molecular hydrogen appear to be enhanced by at least an order of magnitude relative to quiescent cloud values (about 10 to the -9th) for many of the observed sources.
Chol Minh Young
Irvine William M.
McGonagle Douglas
Ziurys Lucy M.
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