Eclipse Mapping of HAT-P-11: Measuring Small Scale Starspots on an Active K-Dwarf

Details Eclipse Mapping of HAT-P-11: Measuring Small Scale Starspots on an Active K-Dwarf Eclipse Mapping of HAT-P-11: Measuring Small Scale Starspots on an Active K-Dwarf

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943915a&link_type=abstract

American Astronomical Society, AAS Meeting #219, #439.15

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With the continuing operation of the Kepler and CoRoT satellites, high precision space-based photometry is now available for a large number of transiting planet host stars. Using short cadence light curves with photometric precision of better than 10-4, we are now, for the first time, able to map relative brightness variations due to small-scale starspots on the surfaces of many stars other than the Sun. We have developed an eclipse mapping analysis code, which applies the Nelder-Mead Simplex (Amoeba) Algorithm to transiting planet host stars to derive relative surface brightness maps of these distant stars. We test our code on the K-dwarf planet host star, HAT-P-11, which shows small flux variations during the transit due to the planet crossing in front of a star spot. In this poster, we present initial results produced by our eclipse mapping code for this system using short cadence Kepler light curves from Quarters 1-4.

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