The Instability Strip of M3

G. Á. Bakos; J. Jurcsik

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arXiv · astro-ph/0004311

The Instability Strip of M3

G. Á. Bakos·J. Jurcsik

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Abstract

We present new multicolour CCD photometry of the central part of the globular cluster M3, mapping the precise position of ~120 RR Lyrae stars (RRab, RRd, RRc) on the horizontal branch (HB). The location of the double-mode variables (RRd) is in perfect agreement with recent theoretical results. We find a significant internal spread of metallicity amongst the RRab variables.

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G. Á. Bakos, J. Jurcsik. 2000-04-21. The Instability Strip of M3. https://arxiv.org/abs/astro-ph/0004311

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