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arXiv 2401.09657astro-ph.EPastro-ph.SR
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TESS发现的一颗处于超级木星到褐矮星质量区间的长周期凌星亚恒星伴星及一颗原型暖木星

A long-period transiting substellar companion in the super-Jupiters to brown dwarfs mass regime and a prototypical warm-Jupiter detected by TESS

Matias I. Jones, Yared Reinarz, Rafael Brahm, Marcelo Tala Pinto, Jan Eberhardt, Felipe Rojas, Amaury H. M. J. Triaud, Arvind F. Gupta, Carl Ziegler, Melissa J.… 展开作者

Matias I. Jones, Yared Reinarz, Rafael Brahm, Marcelo Tala Pinto, Jan Eberhardt, Felipe Rojas, Amaury H. M. J. Triaud, Arvind F. Gupta, Carl Ziegler, Melissa J. Hobson, Andres Jordan, Thomas Henning, Trifon Trifonov, Martin Schlecker, Nestor Espinoza, Pascal Torres-Miranda, Paula Sarkis, Solene Ulmer-Moll, Monika Lendl, Murat Uzundag, Maximiliano Moyano, Katharine Hesse, Douglas A. Caldwell, Avi Shporer, Michael B. Lund, Jon M. Jenkins, Sara Seager, Joshua N. Winn, George R. Ricker, Christopher J. Burke, Pedro Figueira, Angelica Psaridi, Khaled Al Moulla, Dany Mounzer, Matthew R. Standing, David V. Martin, Georgina Dransfield, Thomas Baycroft, Diana Dragomir, Gavin Boyle, Vincent Suc, Andrew W. Mann, Mathilde Timmermans, Elsa Ducrot, Matthew J. Hooton, Sebastian Zuniga-Fernandez, Daniel Sebastian, Michael Gillon, Didier Queloz, Joe Carson, Jack J. Lissauer

AI总结:

本文通过TESS数据与地基后续观测确认并表征了两颗长周期凌星亚恒星伴星,其中TIC 4672985 b处于超级木星到褐矮星质量过渡区且轨道近圆,对标准行星形成演化模型构成挑战。

摘要:

我们报告了对TIC 4672985和TOI-2529周围两颗长周期凌星亚恒星伴星的确认与后续表征,这两颗伴星均处于低偏心率轨道上,其凌星事件由TESS空间任务探测到。来自不同设施的地基测光与光谱后续观测证实了TIC 4672985 b的亚恒星本质,它是一颗大质量气态巨行星,处于超级木星与褐矮星之间的质量过渡区间。通过联合分析,我们推导出以下轨道参数:P = 69.0480天,Mp = 12.74木星质量,Rp = 1.026木星半径,e = 0.018。此外,视向速度时间序列揭示出一个约350 m/s/yr量级的显著趋势,表明系统中存在一个大质量的外侧伴星。TIC 4672985 b是一个独特的凌星亚恒星伴星范例,其质量超过氘燃烧极限,轨道距离大于0.1 AU且接近正圆。这些行星性质很难用标准的行星形成与演化模型来解释。对于TOI-2529 b,我们获得以下轨道参数:P = 64.5949天,Mp = 2.340木星质量,Rp = 1.030木星半径,e = 0.021,使其成为日益增长的凌星暖巨行星族群中的一个新样本。

英文摘要:

We report on the confirmation and follow-up characterization of two long-period transiting substellar companions on low-eccentricity orbits around TIC 4672985 and TOI-2529, whose transit events were detected by the TESS space mission. Ground-based photometric and spectroscopic follow-up from different facilities, confirmed the substellar nature of TIC 4672985 b, a massive gas giant, in the transition between the super Jupiters and brown dwarfs mass regime. From the joint analysis we derived the following orbital parameters: P = 69.0480 d, Mp = 12.74 Mjup, Rp = 1.026 Rjup and e = 0.018. In addition, the RV time series revealed a significant trend at the 350 m/s/yr level, which is indicative of the presence of a massive outer companion in the system. TIC 4672985 b is a unique example of a transiting substellar companion with a mass above the deuterium-burning limit, located beyond 0.1 AU and in a nearly circular orbit. These planetary properties are difficult to reproduce from canonical planet formation and evolution models. For TOI-2529 b, we obtained the following orbital parameters: P = 64.5949 d, Mp = 2.340 Mjup, Rp = 1.030 Rjup and e = 0.021, making this object a new example of a growing population of transiting warm giant planets.

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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