TESS 发现的围绕非活动 M 矮星运行的两颗小型温行星 TOI 122b 与 TOI 237b
地球与行星天体物理
2020-12-16 v1 太阳与恒星天体物理
摘要
我们报告了 TOI 122b 和 TOI 237b 的发现与确认，这两颗温行星凌星于由 \textit{TESS} 观测到的非活动 M 矮星。我们的分析显示 TOI 122b 半径为 2.720.18 R_\rm{e}，接收 8.81.0 地球的全波辐射照度；TOI 237b 半径为 1.440.12 R_\rm{e}，接收 3.70.5 地球辐射照度，跨越了水星从太阳接收的 6.7 地球辐射照度。这使得它们成为 \textit{TESS} 迄今发现的较冷行星中的两颗，即便在其 5.08 天和 5.43 天的轨道上。它们共同跨越了小行星半径谷，为探索 M 矮星周围的挥发性演化提供了有用的实验室。它们相对较近的距离（分别为 62.230.21 pc 和 38.110.23 pc）使它们成为未来径向速度后续观测与大气表征的潜在可行目标，尽管此类观测可能需要在大型望远镜上投入大量时间。
引用
@article{arxiv.2010.15905,
title = {TOI 122b and TOI 237b, two small warm planets orbiting inactive M dwarfs, found by \textit{TESS}},
author = {William C. Waalkes and Zachory K. Berta-Thompson and Karen A. Collins and Adina D. Feinstein and Benjamin M. Tofflemire and Bárbara Rojas-Ayala and Michele L. Silverstein and Elisabeth Newton and George R. Ricker and Roland Vanderspek and David W. Latham and S. Seager and Joshua N. Winn and Jon M. Jenkins and Jessie Christiansen and Robert F. Goeke and Alan M. Levine and H. P. Osborn and S. A. Rinehart and Mark E. Rose and Eric B. Ting and Joseph D. Twicken and Khalid Barkaoui and Jacob L. Bean and César Briceño and David R. Ciardi and Kevin I. Collins and Dennis Conti and Tianjun Gan and Michaël Gillon and Giovanni Isopi and Emmanuël Jehin and Eric L. N. Jensen and John F. Kielkopf and Nicholas Law and Franco Mallia and Andrew W. Mann and Benjamin T. Montet and Francisco J. Pozuelos and Howard Relles and Jessica E. Libby-Roberts and Carl Ziegler},
journal= {arXiv preprint arXiv:2010.15905},
year = {2020}
}
备注
21 pages, 9 figures, 4 tables, accepted to AJ