KOI-13.01: A Spin-Orbit Misaligned Giant Planet Orbiting a Fast-Rotating Star

Details KOI-13.01: A Spin-Orbit Misaligned Giant Planet Orbiting a Fast-Rotating Star KOI-13.01: A Spin-Orbit Misaligned Giant Planet Orbiting a Fast-Rotating Star

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1544b&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1544

Computer Science

Scientific paper

I report a measurement of the stellar spin-planetary orbit alignment in the KOI-13 system, the first such measurement to use transit photometry alone (i.e., not Rossiter-McLaughlin spectroscopy). The star's obliquity to the plane of the sky is 18.5 , and the planet's orbit normal is inclined 34.6 to the projected stellar pole, leading to a net spin-orbit misalignment of 40.3 . Given the much-lower inclinations of solar system planets, I invoke a possible Kozai resonance with the binary stellar companion of the KOI-13 host star as a possible explaination for the high measured inclination.

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