Dark clouds in front of globular clusters

Details Dark clouds in front of globular clusters Dark clouds in front of globular clusters

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...179..255s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 179, no. 1-2, June 1987, p. 255-262. Research supported by the Academy of Finl

Astronomy and Astrophysics

Astrophysics

10

Astronomical Spectroscopy, Dark Matter, Emission Spectra, Globular Clusters, Molecular Clouds, Radio Spectra, Centimeter Waves, Hydrocarbons, Hydroxyl Emission, Interstellar Gas, Line Spectra

Scientific paper

The authors have searched a sample of 14 heavily reddened clusters for OH main line emission at 18 cm. OH was detected in 8 of these: M14, Pal 2, NGC 6287, NGC 6316, NGC 6325, NGC 6517, NGC 6539, and Trz 5, while CH emission is seen in most of the sample. The OH emission appears to be emitted from dark cloud regions lying in front of the clusters. CH emission is perhaps seen also in more tenuous gas and several globular clusters appear to have self-absorbed H I emission. The OH emission is used to derive physical characteristics of the OH emitting regions.

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