Long‐term photometric monitoring of RR Lyrae stars in Messier 3

Johanna Jurcsik,G Hajdu,B Szeidl, K Olah,Janos Kelemen, A Sodor,Abhijit Saha, P S Mallick,Jennifer A Claver

Monthly Notices of the Royal Astronomical Society（2012）

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摘要

The period-change behaviour of 134 RR Lyrae stars in the globular cluster Messier 3 (M3) is investigated on the ∼120 yr time-base of the photometric observations. The mean period-change rates (β≈ 0.01 d Myr−1) of the subsamples of variables exhibiting the most regular behaviour are in good agreement with theoretical expectations based on horizontal branch stellar evolution models. However, a large...

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关键词

stars: evolution,stars: horizontal branch,stars: oscillations,stars: variables: RR Lyrae,globular clusters: individual: M3

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