Discovery of long-period variable stars in the very metal-poor globular cluster M15

We present a search for long-period variable (LPV) stars among giant branch stars in M15 which, at [Fe/H]∼−2.3, is one of the most metal-poor Galactic globular clusters. We use multicolour optical photometry from the 0.6-m Keele Thornton and 2-m Liverpool Telescopes. Variability of δV∼ 0.15 mag is d...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 2010-07, Vol.405 (3), p.1711-1722
Hauptverfasser:	McDonald, I., van Loon, J. Th, Dupree, A. K., Boyer, M. L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Earth, ocean, space Exact sciences and technology globular clusters: individual: M15 Metals outflows Stars & galaxies stars: AGB and post-AGB stars: late-type stars: Population II stars: variables: general stars: winds stars: winds, outflows
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