K2-113b:一颗凌星于太阳类似星的致密热木星
地球与行星天体物理
2017-08-30 v2
摘要
我们报告了K2-113b的发现,这是一颗利用Kepler-2 (K2)任务第8次观测活动的测光数据以及FEROS光谱仪获得的高分辨率光谱后续观测发现的致密热木星。该行星围绕一颗V=13.68的太阳类似星运行,轨道周期为P=5.81760^{+0.00003}_{-0.00003}天,半径为0.93^{+0.10}_{-0.07} R_J,质量为1.29^{+0.13}_{-0.14} M_J。其密度为1.97^{+0.60}_{-0.53} g/cm^3,是已知质量低于2 M_J且平衡温度T_eq > 1000 K的系统中密度最高的行星之一,且恰好高于一般认为膨胀机制开始起作用的温度界限。根据其质量和半径,我们估计K2-113b的重元素含量应在约110 M_{\oplus}或更高的量级。
引用
@article{arxiv.1611.07614,
title = {K2-113b: A dense hot-Jupiter transiting a solar analogue},
author = {Néstor Espinoza and Markus Rabus and Rafael Brahm and Matías Jones and Andrés Jordán and Felipe Rojas and Holger Drass and Maja Vučković and Joel D. Hartman and James S. Jenkins and Cristián Cortés},
journal= {arXiv preprint arXiv:1611.07614},
year = {2017}
}
备注
8 pages, 7 figures. Accepted to MNRAS; added new photometry from newest version of EVEREST, which allows for a constrain on the secondary eclipse depth