两颗凌近邻 M 矮星 TOI-2095 的温热超级地球
地球与行星天体物理
2023-04-20 v1
摘要
我们报告了围绕 TOI-2095（TIC 235678745）的两颗行星的探测与确认。宿主恒星是一颗 3700K 的 M1V 型矮星，具有较高自行。该星位于距地球 42 pc 处天区中恒星稀疏的部分，且在红外波段明亮（K=9）。利用 TESS 第 2 与第 4 周期共 24 个观测扇区的数据，TOI-2095 展现出两组与超级地球尺寸行星相关的凌星信号。这两颗行星的轨道周期分别为 17.7 天和 28.2 天，半径分别为 1.30 和 1.39 地球半径。存档数据、初步跟进观测与筛选分析支持将探测到的凌星信号解释为行星。这对行星的估计平衡温度约为 400 K，恒星辐照度分别为地球的 3.23 和 1.73 倍，使其位于金星带内。这些行星也处于标志岩质主导与富挥发分组成之间过渡的半径区间。因此它们是对后续质量测量以更好理解温热过渡半径行星性质的优先目标。这两颗行星相对较长的轨道周期提供了能够帮助阐明塑造 M 矮星周围小行星组成过程的关键数据。
引用
@article{arxiv.2304.09189,
title = {Two Warm Super-Earths Transiting the Nearby M Dwarf TOI-2095},
author = {Elisa V. Quintana and Emily A. Gilbert and Thomas Barclay and Michele L. Silverstein and Joshua E. Schlieder and Ryan Cloutier and Samuel N. Quinn and Joseph E. Rodriguez and Andrew Vanderburg and Benjamin J. Hord and Dana R. Louie and Colby Ostberg and Stephen R. Kane and Kelsey Hoffman and Jason F. Rowe and Giada N. Arney and Prabal Saxena and Taran Richardson and Matthew S. Clement and Nicholas M. Kartvedt and Fred C. Adams and Marcus Alfred and Travis Berger and Allyson Bieryla and Paul Bonney and Patricia Boyd and Charles Cadieux and Douglas Caldwell and David R. Ciardi and David Charbonneau and Karen A. Collins and Knicole D. Colon and Dennis M. Conti and Mario Di Sora and Shawn Domagal-Goldman and Jessie Dotson and Thomas Fauchez and Maximilian N. Günther and Christina Hedges and Giovanni Isopi and Erika Kohler and Ravi Kopparapu and Veselin B. Kostov and Jeffrey A. Larsen and Eric Lopez and Franco Mallia and Avi Mandell and Susan E. Mullally and Rishi R. Paudel and Brian P. Powell and George R. Ricker and Boris S. Safonov and Richard P. Schwarz and Ramotholo Sefako and Keivan G. Stassun and Robert Wilson and Joshua N. Winn and Roland K. Vanderspek},
journal= {arXiv preprint arXiv:2304.09189},
year = {2023}
}
备注
Submitted to AAS Journals