HD 260655 系统：10 pc 处一颗亮 M 矮星上两颗岩质世界的凌星
地球与行星天体物理
2022-08-31 v3 空间物理
摘要
我们报告了一个凌星多行星系统的发现，其宿主为 M0 V 矮星 HD 260655 (GJ 239, TOI-4599)。该系统至少由两颗凌星行星组成：HD 260655 b，周期 2.77 d，半径 R_b = 1.240±0.023 R_⊕，质量 M_b = 2.14±0.34 M_⊕，体密度 ρ_b = 6.2±1.0 g cm^{-3}；以及 HD 260655 c，周期 5.71 d，半径 R_c = 1.533^{+0.051}_{-0.046} R_⊕，质量 M_c = 3.09±0.48 M_⊕，体密度 ρ_c = 4.7^{+0.9}_{-0.8} g cm^{-3}。这些行星由 TESS 任务通过凌星法探测到，并分别利用自 1998 年和 2016 年起用 HIRES 与 CARMENES 仪器获取的档案及新精密视向速度独立确认。在 10 pc 距离处，HD 260655 成为继 HD 219134、LTT 1445 A 和 AU Mic 之后第四近的已知多凌星行星系统。由于宿主星表观亮度高 (J = 6.7 mag)，这两颗行星均是当今已知最适于用 JWST 进行透射与发射大气研究的岩质世界之一。
引用
@article{arxiv.2204.10261,
title = {The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc},
author = {R. Luque and B. J. Fulton and M. Kunimoto and P. J. Amado and P. Gorrini and S. Dreizler and C. Hellier and G. W. Henry and K. Molaverdikhani and G. Morello and L. Peña-Moñino and M. Pérez-Torres and F. J. Pozuelos and Y. Shan and G. Anglada-Escudé and V. J. S. Béjar and G. Bergond and A. W. Boyle and J. A. Caballero and D. Charbonneau and D. R. Ciardi and S. Dufoer and N. Espinoza and M. Everett and D. Fischer and A. P. Hatzes and Th. Henning and K. Hesse and A. Howard and S. B. Howell and H. Isaacson and S. V. Jeffers and J. M. Jenkins and S. R. Kane and J. Kemmer and S. Khalafinejad and R. C. Kidwell and D. Kossakowski and D. W. Latham and J. Lillo-Box and J. J. Lissauer and D. Montes and J. Orell-Miquel and E. Pallé and D. Pollacco and A. Quirrenbach and S. Reffert and A. Reiners and I. Ribas and G. R. Ricker and L. A. Rogers and J. Sanz-Forcada and M. Schlecker and A. Schweitzer and S. Seager and A. Shporer and K. G. Stassun and S. Stock and L. Tal-Or and E. B. Ting and T. Trifonov and S. Vanaverbeke and R. Vanderspek and J. Villaseñor and J. N. Winn and J. G. Winters and M. R. Zapatero Osorio},
journal= {arXiv preprint arXiv:2204.10261},
year = {2022}
}
备注
24 pages, 17 figures. Accepted for publication in A&A