J ul 2 00 9 Physical properties of double-mode RR Lyrae stars based on pulsation and evolution models

Abstract

We determine the fundamental stellar parameters of altogether 20 double-mode RR Lyrae (RRd) stars from the Galactic Field and the Large Magellanic Cloud, following our approach employed on the field RRd star BS Comae [1]. The stars were selected to cover wide ranges of periods and period ratios, implying diverse stellar parameters. From the possible… (More)

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