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arXiv 2312.03319astro-ph.EP
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利用多扇区 TESS 测光搜索热木星系统中的行星。IV. 12 个系统中的零探测结果

Search for Planets in Hot Jupiter Systems with Multi-Sector TESS Photometry. IV. Null Detections in 12 Systems

G. Maciejewski, J. Sierzputowska, J. Golonka

AI总结:

本研究利用多扇区 TESS 测光与精确凌星时间数据搜索 12 个热木星系统的近旁行星,未发现 2–4 倍地球半径以上的额外凌星行星,并给出 WASP-79 b 周期缩短及 KELT-2A b 疑似系外卫星信号的线索。

摘要:

我们展示了在 12 个行星系统中搜索凌星热木星近旁行星伴星的结果:HAT-P-24、HAT-P-39、HAT-P-42、HAT-P-50、KELT-2、KELT-15、KELT-17、WASP-23、WASP-63、WASP-76、WASP-79 和 WASP-161。我们的分析基于凌星系外行星巡天卫星(Transiting Exoplanet Survey Satellite)的多扇区时间序列测光数据以及精确的凌星时间数据集。在小至 2–4 倍地球半径的范围内,我们未探测到额外的凌星行星。对于十颗热木星,未观测到其偏离线性凌星星历表的现象。尽管我们反驳了文献中所声称的 WASP-161 b 轨道周期的长期变化,但我们注意到 WASP-79 b 存在轨道周期缩短的初步迹象。此外,我们发现 KELT-2A b 存在短周期凌星时间变化,其特征具有所谓系外卫星走廊的典型特点。然而,我们的结论是,需要进一步观测以证实这些发现。

英文摘要:

We present the results of our search for nearby planetary companions of transiting hot Jupiters in 12 planetary systems: HAT-P-24, HAT-P-39, HAT-P-42, HAT-P-50, KELT-2, KELT-15, KELT-17, WASP-23, WASP-63, WASP-76, WASP-79, and WASP-161. Our analysis was based on multi-sector time-series photometry from the Transiting Exoplanet Survey Satellite and precise transit timing data sets. We detected no additional transiting planets down to the 2-4 Earth radii regime. For ten hot Jupiters, no departure from linear transit ephemerides was observed. Whilst we refute long-term variations of the orbital period for WASP-161 b, which were claimed in the literature, we notice a tentative hint of the orbital period shortening for WASP-79 b. In addition, we spot a short-period transit timing variation for KELT-2A b with the characteristics typical of the so-called exomoon corridor. We conclude, however, that further observations are required to confirm these findings.

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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