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arXiv 0908.3032astro-ph.EPastro-ph.SR
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凌日热木星CoRoT-1b的自旋轨道角

The spin-orbit angle of the transiting hot jupiter CoRoT-1b

F. Pont, M. Endl, W. D. Cochran, S. I. Barnes, C. Sneden, P. J. MacQueen, C. Moutou, S. Aigrain, R. Alonso, A. Baglin, F. Bouchy, M. Deleuil, M. Fridlund, G. He… 展开作者

F. Pont, M. Endl, W. D. Cochran, S. I. Barnes, C. Sneden, P. J. MacQueen, C. Moutou, S. Aigrain, R. Alonso, A. Baglin, F. Bouchy, M. Deleuil, M. Fridlund, G. Hebrard, A. Hatzes., T. Mazeh, A. Shporer

摘要:

利用新的HIRES/Keck和FORS/VLT高精度测光系统测量了凌日行星系CoRoT-1的行星轨道与恒星自转轴的夹角。这些数据表明,这是一个高度倾斜的系统,预计自旋轨道角λ = 77 ± 11度。径向速度数据中的系统不确定性可能导致实际误差更大,未知量,这一结果需要进一步高精度光谱凌日测量来证实。现在已经在十几个太阳系外的行星系中测量到了自旋-轨道对准,其中几个显示出强烈的不对准。前三颗偏离轨道的行星都比木星大得多,而且轨道偏心。然而,CoRoT-1是一颗在圆形轨道上的木星质量的近距离行星。如果它的强烈错位得到证实,它将打破这种模式。几种类型的行星和轨道的失调系统的高发生率有利于行星-行星散射作为一种机制,使气体巨星在非常接近的轨道上。

英文摘要:

We measure the angle between the planetary orbit and the stellar rotation axis in the transiting planetary system CoRoT-1, with new HIRES/Keck and FORS/VLT high-accuracy photometry. The data indicate a highly tilted system, with a projected spin-orbit angle lambda = 77 +- 11 degrees. Systematic uncertainties in the radial velocity data could cause the actual errors to be larger by an unknown amount, and this result needs to be confirmed with further high-accuracy spectroscopic transit measurements. Spin-orbit alignment has now been measured in a dozen extra-solar planetary systems, and several show strong misalignment. The first three misaligned planets were all much more massive than Jupiter and followed eccentric orbits. CoRoT-1, however, is a jovian-mass close-in planet on a circular orbit. If its strong misalignment is confirmed, it would break this pattern. The high occurence of misaligned systems for several types of planets and orbits favours planet-planet scattering as a mechanism to bring gas giants on very close orbits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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