Upper Limits on the Atomic Hydrogen Abundance in 12 Globular Clusters
Abstract
A search was made with the NRAO l4O-ft telescope for 21-cm line emission from 12 globular clusters, with negative results. These observations yielded limits on the atomic hydrogen content ranging from 11 M0 for M4 to 85 M0 for M 15, and gave an average value for the galactic H 1 gas-to-dust ratio in the directions of the clusters of l.6X 1021 atom .
- Publication:
-
The Astronomical Journal
- Pub Date:
- September 1972
- DOI:
- 10.1086/111320
- Bibcode:
- 1972AJ.....77..573K