TOI-220 $b$：一颗由 TESS 发现的温暖亚海王星
地球与行星天体物理
2021-06-09 v1
摘要
本文中我们报告 TOI-220 的发现，这是一颗由凌星系外行星巡天卫星（TESS）探测到、并经 HARPS 光谱仪径向速度跟踪观测确认的新的亚海王星。基于 TESS 凌星测光与高精度径向速度测量的联合分析，我们估计其行星质量为 13.8 1.0 M、半径为 3.03 0.15 R， implying 体密度为 2.73 0.47 。TOI-220 围绕一颗相对明亮（V=10.4）且年老（10.11.4 Gyr）的 K 型矮星以约 10.69 d 的周期轨道运行。因此，TOI-220 是一颗具有非常精确质量与半径测定的新的温暖亚海王星。对 TOI-220 内部结构的贝叶斯分析表明，由于其受到的强辐照，该行星的低密度可用处于辐射-对流平衡的蒸汽大气以及位于由硅酸盐地幔和小铁核组成的分异内部之上的超临界水层来解释。
引用
@article{arxiv.2105.01944,
title = {TOI-220 $b$: a warm sub-Neptune discovered by TESS},
author = {S. Hoyer and D. Gandolfi and D. J. Armstrong and M. Deleuil and L. Acuña and J. R. de Medeiros and E. Goffo and J. Lillo-Box and E. Delgado Mena and T. A. Lopez and A. Santerne and S. Sousa and M. Fridlund and V. Adibekyan and K. A. Collins and L. M. Serrano and P. Cortés-Zuleta and S. B. Howell and H. Deeg and A. Aguichine and O. Barragán and E. M. Bryant and B. L. Canto Martins and K. I. Collins and B. F. Cooke and R. F. Díaz and M. Esposito and E. Furlan and S. Hojjatpanah and J. Jackman and J. M. Jenkins and E. L. N. Jensen and D. W. Latham and I. C. Leão and R. A. Matson and L. D. Nielsen and A. Osborn and J. F. Otegi and F. Rodler and S. Sabotta and N. J. Scott and S. Seager and C. Stockdale and P. A. Strøm and R. Vanderspek and V. Van Eylen and P. J. Wheatley and J. N. Winn and J. M. Almenara and D. Barrado and S. C. C. Barros and D. Bayliss and F. Bouchy and P. T. Boyd and J. Cabrera and W. D. Cochran and O. Demangeon and J. P. Doty and X. Dumusque and P. Figueira and W. Fong and S. Grziwa and A. P. Hatzes and P. Kabáth and E. Knudstrup and J. Korth and J. H. Livingston and R. Luque and O. Mousis and S. E. Mullally and H. P. Osborn and E. Pallé and C. M. Persson and S. Redfield and N. C. Santos and J. Smith and J. Šubjak and J. D. Twicken and S. Udry and D. A. Yahalomi},
journal= {arXiv preprint arXiv:2105.01944},
year = {2021}
}
备注
Accepted for publication in MNRAS