Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.0502w&link_type=abstract
American Astronomical Society, ESS meeting #2, #5.02
Astronomy and Astrophysics
Astronomy
Scientific paper
Kepler is observing over 2000 eclipsing binary stars, and we have carefully measured the eclipse times of those systems with orbital periods greater than 1.5 days. We have found that a sizable number of systems possess significant periodic eclipse timing variations in their O-C figures, indicating the presence of (at least) a third body. The signal-to-noise of a stellar eclipse is much larger than that of a planet transit, allowing us to measure very small timing variations, in some cases as small as 20-25 seconds. The amplitude and period of the O-C variations allow us to constrain the mass of the unseen third body: a small amplitude O-C implies a small mass, perhaps substellar. In this talk we report the results of our search for candidate circumbinary non-transiting planets.
Kepler was selected as the 10th mission of the Discovery Program with funding provided by NASA Science Mission Directorate.
Kepler Team
Welsh William F.
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