THE ROTATION PERIOD OF THE PLANET-HOSTING STAR HD 189733
THE ROTATION PERIOD OF THE PLANET-HOSTING STAR HD 189733
复制标题
主星HD 189733的自转周期
DOI：
10.1088/0004-6256/135/1/68
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
J. Winn
中科院分区：
文献类型：
--
作者：
G. Henry;J. Winn
我们介绍了HD 189733的天气光学测光，它是研究最深入的系外行星之一的色球活动的母星。我们大大延长了之前报道的观测的时间跨度，并将恒星自转周期的估计修正了一个数量级以上：P=11.953±0.009天。我们得到了恒星自转轴倾角的下限为54°(95%的置信度)，这证实了早期的证据，即恒星自旋轴和行星轨道轴是很好地对准的。
We present synoptic optical photometry of HD 189733, the chromospherically active parent star of one of the most intensively studied exoplanets. We have significantly extended the timespan of our previously reported observations and refined the estimate of the stellar rotation period by more than an order of magnitude: P = 11.953 ± 0.009 days. We derive a lower limit on the inclination of the stellar rotation axis of 54° (with 95% confidence), corroborating earlier evidence that the stellar spin axis and planetary orbital axis are well aligned.