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arXiv 0909.3397astro-ph.EPastro-ph.CO
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从CoRoT太空任务:VII过境系外行星。“热木星”型行星CoRoT-5b

Transiting exoplanets from the CoRoT space mission: VII. The "hot-Jupiter"-type planet CoRoT-5b

H. Rauer, D. Queloz, Sz. Csizmadia, M. Deleuil, R. Alonso, S. Aigrain, J. M. Almenara, M. Auvergne, A. Baglin, P. Barge, P. Borde, F. Bouchy, H. Bruntt, J. Cabr… 展开作者

H. Rauer, D. Queloz, Sz. Csizmadia, M. Deleuil, R. Alonso, S. Aigrain, J. M. Almenara, M. Auvergne, A. Baglin, P. Barge, P. Borde, F. Bouchy, H. Bruntt, J. Cabrera, L. Carone, S. Carpano, R. De la Reza, H. J. Deeg, R. Dvorak, A. Erikson, M. Fridlund, D. Gandolfi, M. Gillon, T. Guillot, E. Guenther, A. Hatzes, G. Hebrard, P. Kabath, L. Jorda, H. Lammer, A. Leger, A. Llebaria, P. Magain, T. Mazeh, C. Moutou, M. Ollivier, M. Paetzold, F. Pont, M. Rabus, S. Renner, D. Rouan, A. Shporer, B. Samuel, J. Schneider, A. H. M. J. Triaud, G. Wuchterl

摘要:

目标。自2007年以来,CoRoT太空任务继续在其视场内对大约12,000颗恒星进行光度监测,以寻找一系列目标场,以寻找凌日系外行星。在“报警模式”下,可以与正在进行的目标场监测并行地快速检测到深凌信号。CoRoT的第一颗行星已经在这种模式下被发现。方法.对CoRoT原始光变曲线进行轨道残差、异常值和低频恒星信号过滤。利用相位折叠光变曲线拟合凌日信号,推导出主要行星参数。开始进行径向速度跟踪观测,以确保探测和推导行星质量。结果我们报告的CoRoT-5 b的检测,在LRa 01字段,在银河系的反中心方向的第一个长时间字段的观测过程中检测到。CoRoT-5 b是一颗“热彗星型”行星,半径为1.388(+0.046,-0.047)R_Jup,质量为0.467(+0.047,-0.024)M_Jup,因此平均密度为0.217(+0.031,-0.025)g cm-3。这颗行星围绕一颗14.0等的F9 V恒星公转4.0378962 +/- 0.0000019天,轨道距离为0.04947(+0.00026,-0.00029)AU。

英文摘要:

Aims. The CoRoT space mission continues to photometrically monitor about 12 000 stars in its field-of-view for a series of target fields to search for transiting extrasolar planets ever since 2007. Deep transit signals can be detected quickly in the "alarm-mode" in parallel to the ongoing target field monitoring. CoRoT's first planets have been detected in this mode. Methods. The CoRoT raw lightcurves are filtered for orbital residuals, outliers, and low-frequency stellar signals. The phase folded lightcurve is used to fit the transit signal and derive the main planetary parameters. Radial velocity follow-up observations were initiated to secure the detection and to derive the planet mass. Results. We report the detection of CoRoT-5b, detected during observations of the LRa01 field, the first long-duration field in the galactic anticenter direction. CoRoT-5b is a "hot Jupiter-type" planet with a radius of 1.388(+0.046, -0.047) R_Jup, a mass of 0.467(+0.047, -0.024) M_Jup, and therefore, a mean density of 0.217(+0.031, -0.025) g cm-3. The planet orbits an F9V star of 14.0 mag in 4.0378962 +/- 0.0000019 days at an orbital distance of 0.04947(+0.00026, -0.00029) AU.

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