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arXiv · 1108.5683

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

J. M. Nemec·R. Smolec·J. M. Benko·P. Moskalik·K. Kolenberg·R. Szabo·D. W. Kurtz·S. Bryson·E. Guggenberger·M. Chadid·Y. -B. Jeon·A. Kunder·A. C. Layden·K. Kinemuchi·L. L. Kiss·E. Poretti·J. Christensen-Dalsgaard·H. Kjeldsen·D. Caldwell·V. Ripepi·A. Derekas·J. Nuspl·F. Mullally·S. E. Thompson·W. J. Borucki
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Abstract

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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J. M. Nemec, R. Smolec, J. M. Benko, P. Moskalik, K. Kolenberg, R. Szabo, D. W. Kurtz, S. Bryson, E. Guggenberger, M. Chadid, Y. -B. Jeon, A. Kunder, A. C. Layden, K. Kinemuchi, L. L. Kiss, E. Poretti, J. Christensen-Dalsgaard, H. Kjeldsen, D. Caldwell, V. Ripepi, A. Derekas, J. Nuspl, F. Mullally, S. E. Thompson, W. J. Borucki. 2011-08-29. Non-Blazhko RR Lyrae Stars Observed with the KEPLER Space Telescope. https://arxiv.org/abs/1108.5683

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