| Autor: |
Shoya KAMIAKA, Kento MASUDA, Yuxin XUE, Yasushi SUTO, Tsubasa NISHIOKA, Risa MURAKAMI, Koichiro INAYAMA, Madoka SAITOH, Michisuke TANAKA, Atsunori YONEHARA |
| Předmět: |
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| Zdroj: |
Publications of the Astronomical Society of Japan; 2015, Vol. 67 Issue 5, p94-1-94-10, 10p |
| Abstrakt: |
We reanalyse the time-variable light curves of the transiting planetary system PTFO 8-8695, in which a planet of 3 to 4 Jupiter masses orbits a rapidly rotating premain-sequence star. Both the planetary orbital period Porb of 0.448 d and the stellar spin period Ps of less than 0.671 d are unusually short, which makes PTFO 8-8695 an ideal system to check the model of gravity darkening and nodal precession. While the previous analysis of PTFO 8-8695 assumed that the stellar spin and planetary orbital periods are the same, we extend the analysis by discarding the spin-orbit synchronous condition, and find three different classes of solutions roughly corresponding to the nodal precession periods of 199 ± 16, 475 ± 21, and 827 ± 53 d that reproduce the transit light curves observed in 2009 and 2010. We compare the predicted light curves of the three solutions against the photometry data of a few percent accuracy obtained at Koyama Astronomical Observatory in 2014 and 2015, and find that the solution with a precession period of 199 ± 16 d is preferred even though it is preliminary. Future prospects and implications for other transiting systems are briefly discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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