K2-265 b：一颗凌星岩质超级地球
地球与行星天体物理
2018-12-05 v1
摘要
我们报告了利用 K2 测光发现的超级地球 K2-265 b。该行星围绕一颗亮星（V_mag = 11.1，光谱型 G8V）以 2.37 天的周期运行。我们从 HARPS 获得了高精度的后续径向速度测量，联合贝叶斯分析表明 K2-265 b 的半径为 1.71 ± 0.11 R_earth，质量为 6.54 ± 0.84 M_earth，对应的整体密度为 7.1 ± 1.8 g/cm^3。行星的成分分析揭示其具有类地的岩质内部，岩石质量分数为 80%。该行星较短的轨道周期和较小的半径使其位于光致蒸发间隙下限之下，其包层可能因强恒星辐照而侵蚀，留下裸露的核心。对行星核心成分的了解使我们能够推断导致其当前物理参数的可能形成与演化机制。
引用
@article{arxiv.1809.08869,
title = {K2-265 b: A Transiting Rocky Super-Earth},
author = {K. W. F. Lam and A. Santerne and S. G. Sousa and A. Vigan and D. J. Armstrong and S. C. C. Barros and B. Brugger and V. Adibekyan and J. -M. Almenara and E. Delgado Mena and X. Dumusque and D. Barrado and D. Bayliss and A. S. Bonomo and F. Bouchy and D. J. A. Brown and D. Ciardi and M. Deleuil and O. Demangeon and F. Faedi and E. Foxell and J. A. G. Jackman and G. W. King and J. Kirk and R. Ligi and J. Lillo-Box and T. Lopez and C. Lovis and T. Louden and L. D. Nielsen and J. McCormac and O. Mousis and H. P. Osborn and D. Pollacco and N. C. Santos and S. Udry and P. J. Wheatley},
journal= {arXiv preprint arXiv:1809.08869},
year = {2018}
}
备注
14 pages, 9 figures, Accepted for publication in A&A