期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 713, 期 2, 页码 L145-L149出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/713/2/L145
关键词
binaries: eclipsing; planetary systems; stars: individual (BD+47, 2846, GSC0354014027)
资金
- Research Corporation for Science Advancement
- NASA [NNX08AR14G]
- NASA's Science Mission Directorate
- NASA [95439, NNX08AR14G] Funding Source: Federal RePORTER
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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