arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0911.3585astro-ph.EPastro-ph.SR
收藏

CoRoT-1b的Transit时序分析

Transit timing analysis of CoRoT-1b

Sz. Csizmadia, S. Renner, P. Barge, E. Agol, S. Aigrain, R. Alonso, J. M. Almenara, A. S. Bonomo, P. Borde, F. Bouchy, J. Cabrera, H. J. Deeg, R. De la Reza, M.… 展开作者

Sz. Csizmadia, S. Renner, P. Barge, E. Agol, S. Aigrain, R. Alonso, J. M. Almenara, A. S. Bonomo, P. Borde, F. Bouchy, J. Cabrera, H. J. Deeg, R. De la Reza, M. Deleuil, R. Dvorak, A. Erikson, E. W. Guenther, M. Fridlund, P. Gondoin, T. Guillot, A. Hatzes, L. Jorda, H. Lammer, C. Lázaro, A. Leger, A. Llebaria, P. Magain, C. Moutou, M. Ollivier, M. Paetzold, D. Queloz, H. Rauer, D. Rouan, J. Schneider, G. Wuchterl, D. Gandolfi

摘要:

CoRoT是基于空间的过境搜索的先驱,它稳定地提供了数千个高精度的光变曲线,并在长达5个月的时间内连续采样。一颗行星的凌日受到另一个天体的扰动,并不是严格的周期性的。通过研究过境时间变化(TTV),可以在系统中检测到其他对象。对CoRoT-1b的凌日时间进行了分析,以限制系统中其他行星的存在。我们使用了通过改进版的CoRoT数据管道(2.0版)获得的数据。拟合单个渡越以确定中间渡越时间,并分析推导出的$O-C$图。N体积分被用来限制次级行星。没有发现周期短于观测窗口(55天)的周期性时间变化,不太可能存在地球质量特洛伊。一颗质量大于$\sim 1$地球质量的行星,如果该天体与CoRoT-1b处于2:1(外部)平均运动共振,则可以通过目前的数据排除。考虑到最初的圆形轨道:(i)超级地球(小于10个地球质量)的周期小于3.5天,(ii)类土星行星的周期小于5天,(iii)类土星行星的最小轨道周期应该是6.5天。

英文摘要:

CoRoT, the pioneer space-based transit search, steadily provides thousands of high-precision light curves with continuous time sampling over periods of up to 5 months. The transits of a planet perturbed by an additional object are not strictly periodic. By studying the transit timing variations (TTVs), additional objects can be detected in the system. A transit timing analysis of CoRoT-1b is carried out to constrain the existence of additional planets in the system. We used data obtained by an improved version of the CoRoT data pipeline (version 2.0). Individual transits were fitted to determine the mid-transit times, and we analyzed the derived $O-C$ diagram. N-body integrations were used to place limits on secondary planets. No periodic timing variations with a period shorter than the observational window (55 days) are found. The presence of an Earth-mass Trojan is not likely. A planet of mass greater than $\sim 1$ Earth mass can be ruled out by the present data if the object is in a 2:1 (exterior) mean motion resonance with CoRoT-1b. Considering initially circular orbits: (i) super-Earths (less than 10 Earth-masses) are excluded for periods less than about 3.5 days, (ii) Saturn-like planets can be ruled out for periods less than about 5 days, (iii) Jupiter-like planets should have a minimum orbital period of about 6.5 days.

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。

↑