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arXiv 1105.4603astro-ph.EPastro-ph.IM
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TASTE。II。HAT-P-13 b中transit时间变化的新观测研究

TASTE. II. A new observational study of transit time variations in HAT-P-13b

V. Nascimbeni, G. Piotto, L. R. Bedin, M. Damasso, L. Malavolta, L. Borsato

摘要:

TASTE(The Asiago Search for Transit timing variations of Exoplanets)项目正在收集选定的过境系外行星样本的高精度,短节奏光变曲线。有人认为热木星HAT-P-13 b突然偏离线性星历$\sim 20$ min,这意味着系统中存在扰动。使用五个新的过境,我们讨论了这种渡越时间变化(TTV)的可扩展性,并表明,不应排除周期性信号。需要更多的后续观测来限制假设扰动的质量和轨道。

英文摘要:

TASTE (The Asiago Search for Transit timing variations of Exoplanets) project is collecting high-precision, short-cadence light curves for a selected sample of transiting exoplanets. It has been claimed that the hot jupiter HAT-P-13b suddenly deviated from a linear ephemeris by $\sim 20$ min, implying that there is a perturber in the system. Using five new transits, we discuss the plausibility of this transit time variation (TTV), and show that a periodic signal should not be excluded. More follow-up observations are required to constrain the mass and the orbit of the hypothetical perturber.

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