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Asteroseismology of solar-type stars with Kepler I: Data analysis

C. Karoff, W. J. Chaplin, T. Appourchaux, Y. Elsworth, R. A. García, G. Houdek, T. S. Metcalfe, J. Molenda-Żakowicz, M. J. P. F. G. Monteiro, M. J. Thompson, 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, F. Kupka, B. Leroy, H. -G. Ludwig, S. Mathis, A. Noels, R. W. Noyes, T. Roca Cortes, M. Roth, K. H. Sato, J. Schmitt, M. D. Suran, R. Trampedach, K. Uytterhoeven, R. Ventura, P. A. Wilson

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 33.5 days 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.

Keywords
methods: data analysis - stars: interiors - stars: late-type - stars: oscillations

Astronomische Nachrichten
Volume 331, Number 9-10, Page 972
2010 December

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia