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

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 sta...

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Hauptverfasser:	Nemec, J.M, Smolec, R, Benkö, J, Moskalik, P, Kolenberg, Katrien, Szabó, R, Kurtz, D.W, Bryson, S, Guggenberger, E, Chadid, M, Jeon, Y.-B, Kunder, A, Layden, A.C, Kinemuchi, K, Kiss, L.L, Poretti, E, Christensen-Dalsgaard, J, Kjeldsen, H, Caldwell, D, Ripepi, V, Derekas, A, Nuspl, J, Mulally, F, Thompson, S.E, Borucki, W.J
Format:	Tagungsbericht
Sprache:	eng
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Zusammenfassung:	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 stationarity of the low-dispersion (sigma < 1mmag) light curves constructed from ˜18000 long-cadence (30-min) and (for FN Lyr and AW Dra) the ˜150000 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.