Search for Interstellar SH at Radio Frequencies

Details Search for Interstellar SH at Radio Frequencies Search for Interstellar SH at Radio Frequencies

Mar 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971apl.....8...89h&link_type=abstract

Astrophysical Letters, Vol. 8, p.89-91

Astronomy and Astrophysics

Astrophysics

13

Scientific paper

A new search for the two ground-state main-line transitions of interstellar SH at 111 MHz has been unsuccessful. Five sources, including three H II regions that show anomalous OH emission, a supernova remnant, and a dust cloud have all yielded upper limits for the abundance of SH that are small enough to suggest that SH is under-abundant relative to OH in the interstellar medium. In addition, upper limits of 0.7 flux units for the two principal 70-cm lines of NO have been established in the Galactic Center.

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