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

/ Authors

J. Nemec, R. Smolec, J. Benkő, P. Moskalik, K. Kolenberg, R. Szabó, D. Kurtz, S. Bryson, E. Guggenberger, M. Chadid

and 56 more authors

Y. Jeon, A. Kunder, A. Layden, K. Kinemuchi, L. Kiss, E. Poretti, J. Christensen-Dalsgaard, H. Kjeldsen, D. Caldwell, V. Ripepi, A. Derekas, J. Nuspl, F.Mullally, S. Thompson, W. L. I. O. Physics, Astronomy, C. College, Victoria, Canada International Statistics, Research Corporation, Brentwood Bay, Canada Institut fur Astronomie, U. Vienna, Vienna, Austria Konkoly Obs.Hung.Acad.Sciences, Budapešť, Hungary Copernicus Astronomical Center, Warsaw, Poland Harvard College Observatory, Cambridge, Usa Institute of Astrophysics, U. C. Lancashire, UK Nasa Ames Research Center, M. Field, Ca, Usa Obs. Cote d'Azur, U. Sophia-Antipolis, Parc Valrose, France Korea Astronomy, Space Telescope Science Institute, Daejeon, K. D. O. Physics, A. University, Aarhus, Denmark Cerro Tololo Inter-American Observatory, L. Serena, C. Physics, A. Dept., Bowling Green State University, Oh, Usa Osservatorio Astronomico di Brera, Merate, Italy Seti InstituteNASA Ames Research Center, Usa INAF-Osservatorio Astronomico di Capodimonte, Napoli, Italy.

/ 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.

Journal: arXiv: Solar and Stellar Astrophysics

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

/ Authors

J. Nemec, R. Smolec, J. Benkő, P. Moskalik, K. Kolenberg, R. Szabó, D. Kurtz, S. Bryson, E. Guggenberger, M. Chadid

and 56 more authors

/ Abstract

Journal: arXiv: Solar and Stellar Astrophysics