Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS TOI-615b, TOI-622b, and TOI-2641b
Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS TOI-615b, TOI-622b, and TOI-2641b
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TESS 和 HARPS TOI-615b、TOI-622b 和 TOI-2641b 揭示了三颗土星质量的行星凌日 F 型恒星
DOI：
10.1051/0004-6361/202346406
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发表时间：
2023
影响因子：
6.5
通讯作者：
Psaridi A
中科院分区：
文献类型：
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作者：
Psaridi A
虽然确认的系外行星样本继续增长，但围绕早期恒星的凌日系外行星数量仍然有限。这些行星使我们能够在广泛的恒星质量范围内研究行星的性质和形成途径，并研究高辐射对围绕这些恒星运行的热彗星的影响。我们报告了TOI-615 b，TOI-622 b和TOI-2641 b的发现，这三颗行星是土星质量的行星，经过主序星，F型恒星。这些行星是由凌日系外行星勘测卫星（TESS）确定的，并通过补充的地面和径向速度观测得到证实。TOI-615 b是一颗高辐射（~ 1277 F）和膨胀的土星质量的行星，在一个4.66天的轨道上经过一颗6850 K的星星。TOI-622 b的半径为，质量为，轨道周期为6.40天。尽管它的日射通量很高（~ 600 F），但TOI-622 b没有显示出任何半径膨胀的证据。TOI-2641 b是一颗轨道周期为4.88天的行星，它的凌日是掠食的，因此它的半径限制很小。此外，TOI-615 b被认为是通过地面光谱仪和JWST的透射光谱进行大气研究的有吸引力的卫星。未来的大气和自旋轨道对准观测是必不可少的，因为它们可以提供关于大气成分，形成和各种恒星类型的系外行星迁移的信息。
While the sample of confirmed exoplanets continues to grow, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of stellar masses and study the impact of high irradiation on hot Jupiters orbiting such stars. We report the discovery of TOI-615b, TOI-622b, and TOI-2641b, three Saturn-mass planets transiting main sequence, F-type stars. The planets were identified by the Transiting Exoplanet Survey Satellite (TESS) and confirmed with complementary ground-based and radial velocity observations. TOI-615b is a highly irradiated (~1277F⊕) and bloated Saturn-mass planet ( and ) in a 4.66 day orbit transiting a 6850 K star. TOI-622b has a radius of and a mass of in a 6.40 day orbit. Despite its high insolation flux (~600F⊕), TOI-622b does not show any evidence of radius inflation. TOI-2641b is a planet in a 4.88 day orbit with a grazing transit () that results in a poorly constrained radius of . Additionally, TOI-615b is considered attractive for atmospheric studies via transmission spectroscopy with ground-based spectrographs and JWST. Future atmospheric and spin-orbit alignment observations are essential since they can provide information on the atmospheric composition, formation, and migration of exoplanets across various stellar types.