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Mass loss in globular cluster red giants

Cohen, Judith G. (1976) Mass loss in globular cluster red giants. Astrophysical Journal, 203 . L127-L129. ISSN 0004-637X. doi:10.1086/182035.

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Echelle spectra of the brightest globular-cluster red giants, taken with the 4 m telescope at Kitt Peak National Observatory, reveal the presence of emission features at Hα. These are interpreted as evidence for a circumstellar envelope, which is produced by mass loss. The gas is being lost at a velocity such that it is possible that the gas is escaping from the globular cluster. An estimate of the rate of mass loss (2 X 10^(-9) M_⊙ yr^(-1)) is obtained, which agrees well with that expected from revolutionary tracks for the difference in mass between red-giant stars and horizontal-branch stars in globular clusters.

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Cohen, Judith G.0000-0002-8039-4673
Additional Information:© American Astronomical Society • Provided by the NASA Astrophysics Data System. Received 1975 September 2; revised 1975 October 22. We thank T. Gull for advice and instruction on the use of the echelle spectrograph.
Subject Keywords:clusters: globular - stars: circumstellar shells - stars: mass loss
Record Number:CaltechAUTHORS:20190529-161902857
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95905
Deposited By: George Porter
Deposited On:31 May 2019 15:10
Last Modified:16 Nov 2021 17:16

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