TESS 发现一颗环绕中质量 M 型矮星 TOI-2136 的次海王星
地球与行星天体物理
2022-05-25 v1 太阳与恒星天体物理
摘要
我们报道了 TOI-2136b 的发现，这是一颗次海王星行星，每 7.85 天凌星一颗附近的 M4.5V 型恒星，该发现通过 TESS 任务的光度测量识别。宿主恒星距离 pc，半径为 ，质量为 ，有效温度为 。基于档案长期测光，我们估计其恒星自转周期为 天。我们基于一系列地基多波段测光、高角分辨率成像观测以及来自 CFHT/SPIRou 的精密径向速度确认并表征了该行星。我们的联合分析揭示该行星半径为 ，质量测量为 。TOI-2136b 的质量和半径与从水冰到气体主导世界的广泛成分一致。TOI-2136b 接近由热驱动大气质量损失模型预测的低质量恒星半径谷，使其成为未来研究其内部结构和大气特性的有趣目标。
引用
@article{arxiv.2202.10024,
title = {TESS discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136},
author = {Tianjun Gan and Abderahmane Soubkiou and Sharon X. Wang and Zouhair Benkhaldoun and Shude Mao and Étienne Artigau and Pascal Fouqué and Steven Giacalone and Christopher A. Theissen and Christian Aganze and Karen A. Collins and Avi Shporer and Khalid Barkaoui and Mourad Ghachoui and Steve B. Howell and Claire Lamman and Olivier D. S. Demangeon and Artem Burdanov and Charles Cadieux and Jamila Chouqar and Kevin I. Collins and Neil J. Cook and Laetitia Delrez and Brice-Olivier Demory and René Doyon and Georgina Dransfield and Courtney D. Dressing and Elsa Ducrot and Jiahao Fan and Lionel Garcia and Holden Gill and Michaël Gillon and Crystal L. Gnilka and Yilen Gómez Maqueo Chew and Maximilian N. Günther and Christopher E. Henze and Chelsea X. Huang and Emmanuel Jehin and Eric L. N. Jensen and Zitao Lin and James McCormac and Catriona A. Murray and Prajwal Niraula and Peter P. Pedersen and Francisco J. Pozuelos and Didier Queloz and Benjamin V. Rackham and Arjun B. Savel and Nicole Schanche and Richard P. Schwarz and Daniel Sebastian and Samantha Thompson and Mathilde Timmermans and Amaury H. M. J. Triaud and Michael Vezie and Robert D. Wells and Julien de Wit and George R. Ricker and Roland Vanderspek and David W. Latham and Sara Seager and Joshua N. Winn and Jon M. Jenkins},
journal= {arXiv preprint arXiv:2202.10024},
year = {2022}
}
备注
19 pages, 15 figures, submitted to MNRAS