Asteroseismology of Solar-type Stars with Kepler I: Data Analysis

Appourchaux, T.; Basu, S.; Bedding, T. R.; Belkacem, K.; Biazzo, K.; Campante, T. L.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Cortes, T. Roca; Cunha, M. S.; Eggenberger, P.; Elsworth, Y.; Fletcher, S. T.; Garcia, R. A.; Gaulme, P.; Gilliland, R. L.; Gruberbauer, M.; Guzik, J. A.; Handberg, R.; Hekker, S.; Houdek, G.; Karoff, C.; Kjeldsen, H.; Kupka, F.; Leroy, B.; Ludwig, H. -G.; Martic, M.; Mathis, S.; Mathur, S.; Metcalfe, T. S.; Molenda-Zakowicz, J.; Monteiro, M. J. P. F. G.; Mosser, B.; Noels, A.; Noyes, R. W.; Regulo, C.; Roth, M.; Roxburgh, I. W.; Salabert, D.; Sato, K. H.; Schmitt, J.; Stello, D.; Suran, M. D.; Thompson, M. J.; Trampedach, R.; Uytterhoeven, K.; Ventura, R.; Verner, G. A; Wilson, P. A.

research

Asteroseismology of Solar-type Stars with Kepler I: Data Analysis

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.Comment: 5 pages, 4 figure, submitted to Astronomische Nachrichte