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arXiv 2101.02707astro-ph.EPastro-ph.SR
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TOI-1259 Ab--一个有2.7%深凌和一个束缚的白矮星伴星的气体巨行星

TOI-1259Ab -- a gas giant planet with 2.7% deep transits and a bound white dwarf companion

David V. Martin, Kareem El-Badry, Vedad Kunovac Hodžić, Amaury H. M. J. Triaud, Ruth Angus, Jessica Birky, Daniel Foreman-Mackey, Christina Hedges, Benjamin T. … 展开作者

David V. Martin, Kareem El-Badry, Vedad Kunovac Hodžić, Amaury H. M. J. Triaud, Ruth Angus, Jessica Birky, Daniel Foreman-Mackey, Christina Hedges, Benjamin T. Montet, Simon J. Murphy, Alexandre Santerne, Keivan G. Stassun, Alexander P. Stephan, Ji Wang, Paul Benni, Vadim Krushinsky, Nikita Chazov, Nikolay Mishevskiy, Carl Ziegler, Abderahmane Soubkiou, Zouhair Benkhaldoun, Douglas A. Caldwell, Karen Collins, Christopher E. Henze, Natalia M. Guerrero, Jon M. Jenkins, David W. Latham, Adam Levine, Scott McDermott, Susan E. Mullally, George Ricker, Sara Seager, Avi Shporer, Andrew Vanderburg, Roland Vanderspek, Joshua N. Winn

摘要:

我们介绍了TOI-1259 Ab,一个1.0 Rjup的气体巨行星,在3.48天的轨道上经过0.71 Rsun的K矮星。该系统还包含一颗束缚的白矮星伴星TOI-1259 B,距离行星宿主约1600 AU。在9个TESS扇区中观察到过境,深度为2.7%-是已知最深的区域之一-使TOI-1259 Ab成为大气特征描述的有希望的目标。我们的后续径向速度测量表明半振幅K = 71米/秒的变化,这意味着行星质量为0.44兆焦耳。通过对白矮星光谱能量分布的拟合,得到了该系统的总年龄为4.08(+1.21 -0.53)Gyr。K矮星的光变曲线揭示了一个28天周期的自转变化,这意味着陀螺年代学年龄与白矮星的总年龄大致一致。

英文摘要:

We present TOI-1259Ab, a 1.0 Rjup gas giant planet transiting a 0.71 Rsun K-dwarf on a 3.48 day orbit. The system also contains a bound white dwarf companion TOI-1259B with a projected distance of approximately 1600 AU from the planet host. Transits are observed in nine TESS sector and are 2.7 per cent deep - among the deepest known - making TOI-1259Ab a promising target for atmospheric characterization. Our follow-up radial velocity measurements indicate a variability of semiamplitude K = 71 m/s, implying a planet mass of 0.44 Mjup. By fitting the spectral energy distribution of the white dwarf we derive a total age of 4.08 (+1.21 -0.53) Gyr for the system. The K-dwarf's light curve reveals a rotational variability with a period of 28 days, which implies a gyrochronology age broadly consistent with the white dwarf's total age.

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