Journal Article

A carbon-rich Mira variable in a globular cluster: a stellar merger★

Michael W. Feast, John W. Menzies and Patricia A. Whitelock

in Monthly Notices of the Royal Astronomical Society: Letters

Published on behalf of The Royal Astronomical Society

Volume 428, issue 1, pages L36-L38
Published in print January 2013 |
Published online October 2012 | e-ISSN: 1745-3933 | DOI: http://dx.doi.org/10.1093/mnrasl/sls009

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The membership of Matsunaga's variable 1, a carbon-rich, mass-losing, Mira variable, in the globular cluster Lynga 7 is discussed on the basis of radial velocities. We conclude that it is a member, the first known C-Mira in a globular cluster. Since such a variable is expected to have an age of ∼1–2 Gyr and an initial mass of ∼1.5 M, we conclude that this star must be the product of a stellar merger.

Keywords: stars: AGB and post-AGB; stars: carbon; globular clusters: individual: Lynga 7

Journal Article.  1959 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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