Asteroseismology of Solar-type Stars with Kepler I: Data Analysis
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, J. Christensen-Dalsgaard, R. L. Gilliland, H. Kjeldsen, S. Basu,, T. R. Bedding, T. L. Campante, P. Eggenberger
TL;DR
This paper presents the initial asteroseismic analysis of three solar-type stars observed by Kepler, revealing detailed oscillation spectra and potential signatures of stellar surface activity, enhancing understanding of stellar interiors.
Contribution
First detailed asteroseismic analysis of Kepler solar-type stars, identifying oscillation modes and surface activity signatures in high-quality data.
Findings
Detection of about 20 oscillation modes per star
Identification of mixed modes in one star
Possible signature of faculae in the spectra
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.
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