Evolutionary changes in the periods of galactic RRab stars
Jacqueline Vandenbroere, Ennio Poretti, and Jean-Francois Le Borgne
TL;DR
This study analyzes the evolutionary period changes in galactic RRab stars using an expanded database, revealing a new trend with more stars showing increasing periods than decreasing ones.
Contribution
It provides a revised understanding of period changes in RRab stars based on a larger dataset, contrasting previous findings.
Findings
More RRab stars show increasing periods than decreasing ones.
The period change distribution differs from earlier studies.
The expanded database enables more accurate analysis.
Abstract
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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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astronomical Observations and Instrumentation