A Warm Jupiter Transiting an M Dwarf: A TESS Single-transit Event Confirmed with the Habitable-zone Planet Finder
A Warm Jupiter Transiting an M Dwarf: A TESS Single-transit Event Confirmed with the Habitable-zone Planet Finder
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DOI：
10.3847/1538-3881/abac67
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发表时间：
2020-07
期刊：
影响因子：
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通讯作者：
C. Cañas;G. Stefansson;S. Kanodia;S. Mahadevan;W. Cochran;M. Endl;Paul Robertson;C. Bender
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文献类型：
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作者：
C. Cañas;G. Stefansson;S. Kanodia;S. Mahadevan;W. Cochran;M. Endl;Paul Robertson;C. Bender
我们使用现有的TESS测光技术、可居住区域行星探测器的高精度近红外光谱技术以及散斑和自适应光学成像技术，确认了一颗温暖的木星穿过早期M矮星TOI-1899的行星性质。数据显示，在∼29天的轨道上有一颗凌日伴侣，质量和半径分别为和。这颗恒星TOI-1899是已知的拥有凌日温暖木星的质量最低的恒星，我们将讨论围绕M0恒星运行的温暖(K)气体巨星提供的后续机会。我们的观测揭示了TOI-1899.01是一颗蓬松的温暖木星，我们建议进行额外的凌日观测，以完善轨道并限制在TESS中观察到的真正稀释。
We confirm the planetary nature of a warm Jupiter transiting the early M dwarf TOI-1899 using a combination of available TESS photometry; high-precision, near-infrared spectroscopy with the Habitable-zone Planet Finder; and speckle and adaptive optics imaging. The data reveal a transiting companion on an ∼29 day orbit with a mass and radius of and , respectively. The star, TOI-1899, is the lowest-mass star known to host a transiting warm Jupiter, and we discuss the follow-up opportunities afforded by a warm ( K) gas giant orbiting an M0 star. Our observations reveal that TOI-1899.01 is a puffy warm Jupiter, and we suggest additional transit observations to both refine the orbit and constrain the true dilution observed in TESS.