Kepler-1655b 的精确质量测定:一颗具有显著挥发物包层的适度 irradiated 行星
地球与行星天体物理
2018-05-02 v1
摘要
我们确认了一颗小质量、适度 irradiated(F = 155 +/- 7 Fearth)的海王星系外行星,其具有显著的气体包层,以 P=11.8728787+/-0.0000085 天的周期围绕一颗宁静的类太阳 G0V 恒星 Kepler-1655 运行。基于对 Kepler 光变曲线的分析,我们测定 Kepler-1655b 的半径为 2.213+/-0.082 Rearth。我们利用 TNG/HARPS-N 获取了 95 条高分辨率光谱,从而得以表征宿主恒星,并通过高斯过程回归测定 Kepler-1655b 的精确质量为 5.0+3.1/-2.8 Mearth。我们的质量测定以 98% 的置信度排除了类地成分。Kepler-1655b 位于蒸发谷的上边缘,处于岩石行星与富气行星之间相对稀疏占据的过渡区域。因此,它属于我们应积极寻求进一步表征的一类行星。
引用
@article{arxiv.1803.08820,
title = {An accurate mass determination for Kepler-1655b, a moderately-irradiated world with a significant volatile envelope},
author = {R. D. Haywood and A. Vanderburg and A. Mortier and H. A. C. Giles and M. López-Morales and E. D. Lopez and L. Malavolta and D. Charbonneau and A. Collier Cameron and J. L. Coughlin and C. D. Dressing and C. Nava and D. W. Latham and X. Dumusque and C. Lovis and E. Molinari and F. Pepe and A. Sozzetti and S. Udry and F. Bouchy and J. A. Johnson and M. Mayor and G. Micela and D. Phillips and G. Piotto and K. Rice and D. Sasselov and D. Ségransan and C. Watson and L. Affer and A. S. Bonomo and L. A. Buchhave and D. R. Ciardi and A. F. Fiorenzano and A. Harutyunyan},
journal= {arXiv preprint arXiv:1803.08820},
year = {2018}
}
备注
21 pages, 14 figures, 4 tables; accepted for publication in the Astronomical Journal