Abstract
Spectra at 15 Å/mm of 143 red giant stars in 12 southern globular clusters and three old open clusters have been taken with the 1.9 m telescope at Mount Stromlo Observatory. The presence of emission features in the Ha profile has been detected in some stars and assumed as evidence for a circumstellar envelope produced by mass loss. There is clear evidence that the Ha emission is variable in time. M22 and ωCen show a proportionally larger number of stars with emission, and a higher value of their initial angular momentum is suggested as a possible explanation for this effect.
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© 1981 D. Reidel Publishing Company
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Cacciari, C., Freeman, K.C. (1981). Mass Loss in Population II Red Giants. In: Iben, I., Renzini, A. (eds) Physical Processes in Red Giants. Astrophysics and Space Science Library, vol 88. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-8492-9_32
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DOI: https://doi.org/10.1007/978-94-009-8492-9_32
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