Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...210..389m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 389-398.
Astronomy and Astrophysics
Astrophysics
5
Cosmic Dust, Cosmic Gases, Globular Clusters, Hydrocarbons, Hydrogen Clouds, Radio Observation, Emission Spectra, Ground State, Interstellar Chemistry, Interstellar Extinction, Radio Telescopes, Stellar Luminosity
Scientific paper
The gas-to-dust ratio beyond the immediate solar neighborhood is investigated using observations of the CH ground state emission line at 3335 MHz toward 16 globular clusters. The results show that the N(CH) to E(B - V) ratio is significantly lower for the globular cluster lines of sight than for dark clouds. The total hydrogen column density toward the globular clusters is obtained, and its ratio to E(B - V) is found to be in agreement with other observations. The ratio is used to derive a color excess E(B - V) = 1.6 m + or - 0.2 m for the Pal 10 cluster, which differs significantly from the cosec-law value of 1.15 m, the only available color excess estimate for Pal 10 so far.
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