TWO SMALL PLANETS TRANSITING HD 3167
TWO SMALL PLANETS TRANSITING HD 3167
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两颗小行星凌日 HD 3167
DOI：
10.3847/2041-8205/829/1/l9
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Salama
中科院分区：
文献类型：
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作者：
A. Vanderburg;A. Bieryla;D. Duev;R. Jensen;D. Latham;A. Mayo;C. Baranec;P. Berlind;S. Kulkarni;N. Law;M. Nieberding;R. Riddle;M. Salama
利用K2使命收集的数据，我们报告了两颗超级地球大小的行星在晚G矮星HD 3167附近的明亮（V = 8.94，K = 7.07）过境的发现。内行星HD 3167 B的半径为1.6 R，轨道周期极短，只有0.96天。外行星HD 3167 c的半径为2.9 R，每29.85天绕其宿主星星一周。HD 3167距离地球只有45.8 ± 2.2秒差距，是距离地球最近且最明亮的恒星之一，拥有多颗凌日行星，使HD 3167 B和C非常适合后续观测。这颗星星的色球不活跃，旋转线增宽很低，这是测量行星质量的径向速度观测的理想选择。这颗外行星足够大，它可能有一个厚厚的气体外壳，可以通过透射光谱学进行研究。经过像HD 3167这样明亮的邻近恒星的行星是詹姆斯·韦伯太空望远镜发射前值得研究的有价值的物体。
We report the discovery of two super-Earth-sized planets transiting the bright (V = 8.94, K = 7.07) nearby late G-dwarf HD 3167, using data collected by the K2 mission. The inner planet, HD 3167 b, has a radius of 1.6 R⊕ and an ultra-short orbital period of only 0.96 days. The outer planet, HD 3167 c, has a radius of 2.9 R⊕ and orbits its host star every 29.85 days. At a distance of just 45.8 ± 2.2 pc, HD 3167 is one of the closest and brightest stars hosting multiple transiting planets, making HD 3167 b and c well suited for follow-up observations. The star is chromospherically inactive with low rotational line-broadening, ideal for radial velocity observations to measure the planets’ masses. The outer planet is large enough that it likely has a thick gaseous envelope that could be studied via transmission spectroscopy. Planets transiting bright, nearby stars like HD 3167 are valuable objects to study leading up to the launch of the James Webb Space Telescope.