Transiting exoplanets from the CoRoT space mission: III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS
Transiting exoplanets from the CoRoT space mission: III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS
复制标题
CoRoT 太空任务中的凌日系外行星：III。
DOI：
10.1051/0004-6361:200809433
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发表时间：
2008
影响因子：
6.5
通讯作者：
G. Wuchterl
中科院分区：
文献类型：
--
作者：
F. Bouchy;D. Queloz;M. Deleuil;B. Loeillet;A. Hatzes;S. Aigrain;R. Alonso;M. Auvergne;A. Baglin;P. Barge;W. Benz;P. Bordé;H. Deeg;R. Reza;R. Dvorak;A. Erikson;M. Fridlund;P. Gondoin;T. Guillot;G. Hébrard;L. Jorda;H. Lammer;A. L'eger;A. Llebaria;P. Magain;M. Mayor;C. Moutou;M. Ollivier;M. Pätzold;F. Pepe;F. Pont;H. Rauer;D. Rouan;J. Schneider;A. Triaud;S. Udry;G. Wuchterl
我们报告了用高精度光谱仪SOPHIE和HARPS观测到的大质量热木星CoRoT-Exo-2b的光谱凌日。通过模拟凌日过程中由于罗西特-麦克劳克林（RM）效应而产生的径向速度异常，我们确定了恒星自旋与行星轨道轴之间的天空投影角接近于零λ =7.2+-4.5度，我们确定了CoRoT-Exo-2b的行星性质。讨论了恒星活动对RM模型的影响。给出了母星星的HARPS光谱分析。
We report on the spectroscopic transit of the massive hot-Jupiter CoRoT-Exo-2b observed with the high-precision spectrographs SOPHIE and HARPS. By modeling the radial velocity anomaly occurring during the transit due to the Rossiter-McLaughlin (RM) effect, we determine the sky-projected angle between the stellar spin and the planetary orbital axis to be close to zero lambda=7.2+-4.5 deg, and we secure the planetary nature of CoRoT-Exo-2b. We discuss the influence of the stellar activity on the RM modeling. Spectral analysis of the parent star from HARPS spectra are presented.