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arXiv 1102.3470astro-ph.EP
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系外行星OGLE-TR-111 b的五个新的Transit纪元

Five New Transit Epochs of the Exoplanet OGLE-TR-111b

Sergio Hoyer, Patricio Rojo, Mercedes López-Morales, Rodrigo Díaz, John E. Chambers, Dante Minniti

摘要:

我们报告了2008年4月至5月期间,在ESO甚大望远镜FORS 1和FORS 2的v-HIGH和Bessell I波段观测到的太阳系外行星OGLE-TR-111 b的五个新的凌日时期。新的凌日与之前公布的所有凌日数据相结合,提供了一个新的凌日时间变化(TTV)分析。我们在4年的观察时间基线上丢弃了振幅大于1.5分钟的TTV,这与Adams等人最近的结果一致。(2010年a)。动力学模拟完全排除了系统中存在质量分别大于1.3、0.4和0.5 M地球的其他行星。在3:2和1:2平均运动共振之间的区域,我们还将潜在第二行星的质量上限定为30 M_earth。

英文摘要:

We report five new transit epochs of the extrasolar planet OGLE-TR-111b, observed in the v-HIGH and Bessell I bands with the FORS1 and FORS2 at the ESO Very Large Telescope, between April and May 2008. The new transits have been combined with all previously published transit data for this planet to provide a new Transit Timing Variations (TTVs) analysis of its orbit. We discard TTVs with amplitudes larger than 1.5 minutes over a 4-year observation time baseline, in agreement with the recent result by Adams et al.(2010a). Dynamical simulations fully exclude the presence of additional planets in the system with masses greater than 1.3, 0.4 and 0.5 M_earth at the 3:2, 1:2, 2:1 resonances, respectively. We also place an upper limit of about 30 M_earth on the mass of potential second planets in the region between the 3:2 and 1:2 mean-motion resonances.

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