Evolutionary changes in the periods of galactic RRab stars

Details Evolutionary changes in the periods of galactic RRab stars Evolutionary changes in the periods of galactic RRab stars

2012-02-16

arxiv.org/abs/1202.3546v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proceedings of the 20th Stellar Pulsation Conference Series: "Impact of new instrumentation & new insights in stellar pulsatio

Scientific paper

Le Borgne et al. (2007) report on the determination of evolutionary changes in the periods of field RR Lyr stars. Thanks to the extension of the GEOS database, we could analyze a sample twice larger than the previous one. We obtained a different picture of the period changes, with a number of stars showing an increasing period greater than that of stars showing a decreasing period.

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