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|a Seager, Sara
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|a Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
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|a Seager, Sara
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|a Welsh, William F.
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|a Orosz, Jerome A.
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|a Fortney, Jonathan J.
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|a Jenkins, Jon M.
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|a Rowe, Jason F.
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|a Koch, David
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|a Borucki, William J.
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|a The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7
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|b IOP Publishing,
|c 2012-10-17T19:37:29Z.
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|u http://hdl.handle.net/1721.1/74057
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|a We present an analysis of the early Kepler observations of the previously discovered transiting planet HAT-P-7b. The light curve shows the transit of the star, the occultation of the planet, and the orbit phase-dependent light from the planet. In addition, phase-dependent light from the star is present, known as "ellipsoidal variations." The very nearby planet (only four stellar radii away) gravitationally distorts the star and results in a flux modulation twice per orbit. The ellipsoidal variations can confuse interpretation of the planetary phase curve if not self-consistently included in the modeling. We fit the light curve using the Roche potential approximation and derive improved planet and orbit parameters.
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|a Article
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|t Astrophysical Journal. Letters
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