M5V-M6V 双星系统 TOI-2267 中的两颗温暖的地球大小系外行星及一个地球大小候选星
地球与行星天体物理
2025-10-29 v2 太阳与恒星天体物理
摘要
我们报告了在靠近双星系统 TOI-2267（M5+M6，分离约 8 au）中的两颗温暖地球大小系外行星。来自 TESS 和地面观测设施的数据确认了这些行星，但我们无法确定它们究竟环绕哪颗恒星。若围绕 TOI-2267A，行星的半径分别为 1.00+/-0.11 R_Earth（TOI-2267 b，P=2.28 d）和 1.14+/-0.13 R_Earth（TOI-2267 c，P=3.49 d）；若围绕 TOI-2267B，则分别为 1.22+/-0.29 R_Earth 和 1.36+/-0.33 R_Earth。TESS 还发现一个候选信号（TOI-2267.02，P=2.03 d，0.95+/-0.12 或 1.13+/-0.30 R_Earth）。动力学分析表明，这三颗行星不能共存于同一颗恒星上；最稳定的配置是行星 b 和 c（接近 3:2 共振）环绕一颗恒星，而候选星环绕另一颗。这一情景将使 TOI-2267 成为已知最紧凑的双星系统，拥有可传递的行星，为研究行星形成与演化在紧凑双星中的过程提供了独特的基准。
引用
@article{arxiv.2508.14176,
title = {Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267},
author = {S. Zúñiga-Fernández and F. J. Pozuelos and M. Dévora-Pajares and N. Cuello and M. Greklek-McKeon and K. G. Stassun and V. Van Grootel and B. Rojas-Ayala and J. Korth and M. N. Günther and A. J. Burgasser and C. Hsu and B. V. Rackham and K. Barkaoui and M. Timmermans and C. Cadieux and R. Alonso and I. A. Strakhov and S. B. Howell and C. Littlefield and E. Furlan and P. J. Amado and J. M. Jenkins and J. D. Twicken and M. Sucerquia and Y. T. Davis and N. Schanche and K. A. Collins and A. Burdanov and F. Davoudi and B. -O. Demory and L. Delrez and G. Dransfield and E. Ducrot and L. J. Garcia and M. Gillon and Y. Gómez Maqueo Chew and C. Janó Muñoz and E. Jehin and C. A. Murray and P. Niraula and P. P. Pedersen and D. Queloz and R. Rebolo-López and M. G. Scott and D. Sebastian and M. J. Hooton and S. J. Thompson and A. H. M. J. Triaud and J. de Wit and M. Ghachoui and Z. Benkhaldoun and R. Doyon and D. Lafrenière and V. Casanova and A. Sota and I. Plauchu-Frayn and A. Khandelwal and F. Zong Lang and U. Schroffenegger and S. Wampfler and M. Lendl and R. P. Schwarz and F. Murgas and E. Palle and H. Parviainen},
journal= {arXiv preprint arXiv:2508.14176},
year = {2025}
}
备注
18 pages article, 12 pages Appendix. Accepted for publication in A&A. Corresponding authors: S. Z\'u\~niga-Fern\'andez and F. J. Pozuelos