Confirming Earth-size Planets Detections By Modeling Kepler Transit Light Curves As False Positives.

Details Confirming Earth-size Planets Detections By Modeling Kepler Transit Light Curves As False Positives. Confirming Earth-size Planets Detections By Modeling Kepler Transit Light Curves As False Positives.

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.5906f&link_type=abstract

American Astronomical Society, DPS meeting #42, #59.06; Bulletin of the American Astronomical Society, Vol. 42, p.1085

Physics

Optics

Scientific paper

We model the photometry of Kepler transiting planet candidates assuming it is the result of the brightness variations of an eclipsing binary being attenuated by the brighter candidate star. We explore both triple systems at the distance of the target, and background systems, where the eclipsing object may be a star or a planet.
We are able to identify which blend systems fit the data well. In many cases, we can exclude that the photometry could be due to a triple system. There are some cases where we can also rule out background blends and provide strong support for the planetary origin of the signal.
For the shallow eclipses that could be due to Earth-size transiting planets, we can identify a specific range of spectral type and magnitude difference compared to the target for possible blends. Combining this information with adaptive optics imaging, speckle interferometry, spectroscopic analysis, and the centroid shift of Kepler data occurring during the transit, allows us to assign a statistical confidence level to the conclusion that the observed signal is due to an Earth-size planet.

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