TESS Reveals HD 118203 b to be a Transiting Planet
TESS Reveals HD 118203 b to be a Transiting Planet
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DOI：
10.3847/1538-3881/ab84f2
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
J. Pepper;S. Kane;Joseph E. Rodriguez;N. Hinkel;J. Eastman;T. Daylan;T. Močnik;P. Dalba;T. Fe
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文献类型：
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作者：
J. Pepper;S. Kane;Joseph E. Rodriguez;N. Hinkel;J. Eastman;T. Daylan;T. Močnik;P. Dalba;T. Fe
系外行星 HD 118203 b 绕着一颗明亮的 (V = 8.05) 主星运行，由 da Silva 等人使用视向速度法发现，但之前并不知道它凌日。凌日系外行星勘测卫星（TESS）光度测量显示，这颗行星凌日其主恒星。 TESS 观测到了九次行星凌日，使我们能够测量行星的半径 ，并计算行星的质量 。主星稍有演化，有效温度为 K，表面重力为 。该行星的轨道周期为数天，偏心率为 0.314 ± 0.017，处于圆形热木星和轨道周期较长的动态活跃行星之间的过渡状态。这颗主星是已知的 10 颗最亮的凌日巨行星之一，为行星大气和星震研究提供了机会。
The exoplanet HD 118203 b, orbiting a bright (V = 8.05) host star, was discovered using the radial velocity method by da Silva et al., but was not previously known to transit. Transiting Exoplanet Survey Satellite (TESS) photometry has revealed that this planet transits its host star. Nine planetary transits were observed by TESS, allowing us to measure the radius of the planet to be , and to calculate the planet mass to be . The host star is slightly evolved with an effective temperature of K and a surface gravity of . With an orbital period of days and an eccentricity of 0.314 ± 0.017, the planet occupies a transitional regime between circularized hot Jupiters and more dynamically active planets at longer orbital periods. The host star is among the 10 brightest known to have transiting giant planets, providing opportunities for both planetary atmospheric and asteroseismic studies.