Asteroseismology of Solar-type Stars with Kepler I: Data Analysis
astro-ph.SR
/ Authors
C. Karoff, W. J. Chaplin, T. Appourchaux, Y. Elsworth, R. A. Garcia, G. Houdek, T. S. Metcalfe, J. Molenda-Zakowicz, M. J. P. F. G. Monteiro, M. J. Thompson
and 39 more authors
J. Christensen-Dalsgaard, R. L. Gilliland, H. Kjeldsen, S. Basu, T. R. Bedding, T. L. Campante, P. Eggenberger, S. T. Fletcher, P. Gaulme, R. Handberg, S. Hekker, M. Martic, S. Mathur, B. Mosser, C. Regulo, I. W. Roxburgh, D. Salabert, D. Stello, G. A Verner, K. Belkacem, K. Biazzo, M. S. Cunha, M. Gruberbauer, J. A. Guzik
/ Abstract
We report on the first asteroseismic analysis of solar-type stars observed by Kepler. Observations of three G-type stars, made at one-minute cadence during the first 33.5d of science operations, reveal high signal-to-noise solar-like oscillation spectra in all three stars: About 20 modes of oscillation can clearly be distinguished in each star. We discuss the appearance of the oscillation spectra, including the presence of a possible signature of faculae, and the presence of mixed modes in one of the three stars.