Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21811801g&link_type=abstract
American Astronomical Society, AAS Meeting #218, #118.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astrophysics
Scientific paper
Through a qualitatively unique combination of both highly precise and nearly continuous multi-year, time-series photometry on 150,000 stars, Kepler is providing fundamentally new stellar astrophysics insights. In this talk I will introduce the characteristics of Kepler observations and results relevant to these studies. Some examples: (1) Stars like the Sun show low-amplitude acoustic oscillations. Kepler has provided better asteroseismic results for hundreds of solar-like stars than existed previously for only about 25 cases. (2) The recent detection of gravity mode oscillations excited in the deep interior of red giants, coupled with study of acoustic modes on the same stars is providing the meaningful constraints on stellar evolution theory long promised by asteroseismology. (3) On the timescale of several hours most relevant to the Kepler planet search program, we know from SOHO observations that the Sun varies by about 10 parts per million. Kepler is now providing measurements of this variability, with results averaging somewhat more than the Sun for thousands of stars. The era of ensemble studies of statistically robust samples of stars for asteroseismology and low-level variability possible previously only for the Sun has now begun.
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