The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
复制标题
DOI：
10.1086/512159
复制
发表时间：
2006-12
期刊：
影响因子：
--
通讯作者：
J. Winn;M. Holman;G. Henry;Anna Roussanova;K. Enya;Y. Yoshii;Avi Shporer;T. Mazeh;J. Johnson;N. Narita;Y. Suto
中科院分区：
文献类型：
--
作者：
J. Winn;M. Holman;G. Henry;Anna Roussanova;K. Enya;Y. Yoshii;Avi Shporer;T. Mazeh;J. Johnson;N. Narita;Y. Suto
本文给出了HD 189733近距离巨行星8次凌日期间的测光结果和2年的凌日外测光结果。利用凌日测光，我们确定了恒星和行星的半径以及测光星历。在凌日之外，有13.4天周期的准周期通量变化，我们将其归因于恒星自转。结合以前的结果，我们得出的轨道偏心率和恒星旋转轴和行星轨道之间的真实角度（相对于这些轴在天空中的投影之间的角度）的上限。
We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).