Can stellar activity make a planet seem misaligned
Can stellar activity make a planet seem misaligned
复制标题
恒星活动会让行星看起来错位吗
DOI:
10.1051/0004-6361/201628728
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
A. Reiners
中科院分区:
文献类型:
--
作者:
M. Oshagh;S. Dreizler;N. C. Santos;P. Figueira;A. Reiners
Several studies have shown that the occultation of stellar active regions by the transiting planet can generate anomalies in the high-precision transit light curves, and these anomalies may lead to an inaccurate estimate of the planetary parameters (e.g., the planet radius). Since the physics and geometry behind the transit light curve and the Rossiter-McLaughlin effect (spectroscopic transit) are the same, the Rossiter-McLaughlin observations are expected to be affected by the occultation of stellar active regions in a similar way. In this paper we perform a fundamental test on the spin-orbit angles as derived by Rossiter-McLaughlin measurements, and we examine the impact of the occultation of stellar active regions by the transiting planet on the spin-orbit angle estimations. Our results show that the inaccurate estimation on the spin-orbit angle due to stellar activity can be quite significant (up to ~30 deg), particularly for the edge-on, aligned, and small transiting planets. Therefore, our results suggest that the aligned transiting planets are the ones that can be easily misinterpreted as misaligned owing to the stellar activity. In other words, the biases introduced by ignoring stellar activity are unlikely to be the culprit for the highly misaligned systems.
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DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
M. Oshagh;Nuno C. Santos;P. Figueira;V. Adibekyan;A. Santerne;Susana C. C. Barros;J. Lima
通讯作者:
J. Lima
DOI:
10.1086/142826
发表时间:
1924-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. B. McLaughlin
通讯作者:
D. B. McLaughlin
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
I. Snellen
通讯作者:
I. Snellen
影响因子:
4.8
作者:
S. Barros;G. Boué;G. Boué;G. Boué;N. P. Gibson;D. Pollacco;A. Santerne;F. Keenan;I. Skillen;R. Street
通讯作者:
S. Barros;G. Boué;G. Boué;G. Boué;N. P. Gibson;D. Pollacco;A. Santerne;F. Keenan;I. Skillen;R. Street
影响因子:
6.5
作者:
S. Czesla;K. Huber;U. Wolter;S. Schröter;J. Schmitt
通讯作者:
S. Czesla;K. Huber;U. Wolter;S. Schröter;J. Schmitt