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arXiv 2301.08484astro-ph.EP
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地面与TESS photometry相结合的过渡系统HAT-P-13、HAT-P-16和WASP-32的研究

The study on transiting systems HAT-P-13, HAT-P-16 and WASP-32 through combining ground-based and TESS photometry

L. Sun, S. Gu, X. Wang, L. Bai, J. H. M. M. Schmitt, V. Perdelwitz

摘要:

高精度的凌日测光为探测新的系外行星和表征其物理特性提供了理想的机会,这些物理特性通常编码有价值的信息,用于揭示行星的结构,大气和动力学历史。我们提出了三个过渡系统的修正性质(即,HAT-P-13、HAT-P-16和WASP-32)的TESS测光和地面凌日观测资料,并结合文献资料进行分析。在模拟渡越光变曲线时,采用高斯过程来考虑潜在的系统误差。通过全面的时序分析,我们发现HAT-P-13 b和HAT-P-16 b都显示出明显的时序变化(TTV),这可以用拱点进动来解释。WASP-32 b的TTV可能是由于潮汐耗散或拱点进动而导致的衰减轨道。然而,目前的观测结果还不能完全排除这三个系统的TTV起源于近距离行星伴星的引力摄动。

英文摘要:

High-precision transit photometry supplies ideal opportunities for detecting new exoplanets and characterizing their physical properties, which usually encode valuable information for unveiling the planetary structure, atmosphere and dynamical history. We present revised properties of three transiting systems (i.e., HAT-P-13, HAT-P-16 and WASP-32) through analyzing TESS photometry and ground-based transit observations, which were obtained at the 1m and 2.4m telescopes of Yunnan Observatories, China, and the 1.2m telescope of Hamburg Observatory, Germany, as well as the data in the literature. During modelling the transit light curves, Gaussian process is employed to account for the potential systematic errors. Through comprehensive timing analysis, we find that both HAT-P-13b and HAT-P-16b show significant timing variations (TTVs) that can be explained by apsidal precession. TTVs of WASP-32b may be led by a decaying orbit due to tidal dissipation or apsidal precession. However, the current observations can not rule out the origins of three systems' TTVs from gravitational perturbations of close planetary companions conclusively.

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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