Cepheid investigations using the Kepler space telescope
Abstract
We report results of initial work done on selected candidate Cepheids to be observed with the Kepler space telescope. Prior to the launch 40 candidates were selected from previous surveys and databases. The analysis of the first 322 days of Kepler photometry, and recent ground-based follow-up multicolour photometry and spectroscopy allowed us to confirm that one of these stars, V1154 Cyg (KIC 7548061), is indeed a 4.9-d Cepheid. Using the phase lag method we show that this star pulsates in the fundamental mode. New radial velocity data are consistent with previous measurements, suggesting that a long-period binary component is unlikely. No evidence is seen in the ultra-precise, nearly uninterrupted Kepler photometry for nonradial or stochastically excited modes at the micromagnitude level. The other candidates are not Cepheids but an interesting mix of possible spotted stars, eclipsing systems and flare stars.
Keywords
Cite
@article{arxiv.1101.2443,
title = {Cepheid investigations using the Kepler space telescope},
author = {R. Szabó and L. Szabados and C. -C. Ngeow and R. Smolec and A. Derekas and P. Moskalik and J. Nuspl and H. Lehmann and G. Fűrész and J. Molenda-Zakowicz and S. T. Bryson and A. A. Henden and D. W. Kurtz and D. Stello and J. M. Nemec and J. M. Benkő and L. Berdnikov and H. Bruntt and N. R. Evans and N. A. Gorynya and E. N. Pastukhova and R. J. Simcoe and J. E. Grindlay and E. J. Los and A. Doane and S. G. Laycock and D. J. Mink and G. Champine and A. Sliski and G. Handler and L. L. Kiss and Z. Kolláth and J. Kovács and J. Christensen-Dalsgaard and H. Kjeldsen and C. Allen and S. E. Thompson and J. Van Cleve},
journal= {arXiv preprint arXiv:1101.2443},
year = {2015}
}
Comments
13 pages, 15 figures, accepted for publication in MNRAS, electronic-only tables are available upon request from the first author