Non-Blazhko RR Lyrae Stars Observed with the KEPLER Space Telescope

Details Non-Blazhko RR Lyrae Stars Observed with the KEPLER Space Telescope Non-Blazhko RR Lyrae Stars Observed with the KEPLER Space Telescope

2011-08-29

arxiv.org/abs/1108.5683v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

To appear in the Carnegie Observatories Astrophysics Series, volume 5

Scientific paper

This paper summarizes the main results of our recent study of the non-Blazhko RR Lyrae stars observed with the Kepler space telescope. These stars offer the opportunity for studying the stability of the pulsations of RR Lyrae stars and for providing a reference against which the Blazhko RR Lyrae stars can be compared. Of particular interest is the stability of the low-dispersion (sigma < 1mmag) light curves constructed from ~18,000 long-cadence (30-min) and (for FN Lyr and AW Dra) the ~150,000 short-cadence (1-min) photometric data points. Fourier-based [Fe/H] values and other physical characteristics are also derived. When the observed periods are compared with periods computed with the Warsaw non-linear convective pulsation code better agreement is achieved assuming pulsational L and M values rather than the (higher) evolutionary L and M values.

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