The Kepler Short Cadence Data and Applications for Asteroseismology and Transit Light Curves

Details The Kepler Short Cadence Data and Applications for Asteroseismology and Transit Light Curves The Kepler Short Cadence Data and Applications for Asteroseismology and Transit Light Curves

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530504g&link_type=abstract

American Astronomical Society, AAS Meeting #215, #305.04; Bulletin of the American Astronomical Society, Vol. 42, p.302

Astronomy and Astrophysics

Astronomy

Scientific paper

The Kepler data acquisition allows 512 targets to be followed in a 'short cadence' mode with roughly 1-minute integrations as needed for asteroseismology of solar analogs having p-mode oscillations of a few minutes, and to study fine details of high S/N transits. Characteristics of these data will be described. An application of asteroseismology in support of the core Kepler mission of characterizing detected planets follows from stellar radius determinations needed to in turn provide radii for the planets. The steps from processing of Kepler short cadence data, derivation of asteroseismic frequencies from power spectra of these time series, constraint on the mean stellar density and ultimately stellar radius will be illustrated for a few planet host stars yielding radii to accuracies approaching 1%. Analysis of individual oscillation frequencies will provide information about the properties of stellar interiors, resulting in some cases in determinations of ages to about 10%. Asteroseismic results will ultimately be expected for several thousand stars ranging from the solar analog oscillations mentioned above, to oscillations in red giants and a full spectrum of classical variable stars (both at short, and the 30-minute long cadence) including delta Scuti, RR Lyrae, RoAp stars etc.
Kepler was selected as the 10th mission of the Discovery Program. Funding for this mission is provided by NASA, Science Mission Directorate.

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