THE KEPLER-10 PLANETARY SYSTEM REVISITED BY HARPS-N: A HOT ROCKY WORLD AND A SOLID NEPTUNE-MASS PLANET

THE KEPLER-10 PLANETARY SYSTEM REVISITED BY HARPS-N: A HOT ROCKY WORLD AND A SOLID NEPTUNE-MASS PLANET
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HARPS-N 重新审视 KEPLER-10 行星系统:炎热的岩石世界和固态海王星质量行星

DOI:
10.1088/0004-637x/789/2/154
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发表时间:
2014
期刊:
The Astrophysical Journal
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开普勒-10b是开普勒卫星探测到的第一颗岩石行星,并通过径向速度跟踪观测得到证实。这颗行星的质量测量精度约为30%,这不足以详细限制其内部结构和组成的模型。除了开普勒-10 b外,还有第二颗行星以45天的周期经过同一颗星星,但其径向速度仅足以为开普勒-10 c的质量设定20 M的上限。为了提高行星B质量的精确度,HARPS-N协作组决定用位于拉帕尔马的国家伽利略望远镜上的HARPS-N摄谱仪对开普勒-10进行密集观测。在两个观测季节中,总共获得了148个高质量的径向速度测量值。这些新数据使我们能够将Kepler-10 b的质量测定精度提高到15%。质量为3.33±0.49 M,更新半径为
Kepler-10b was the first rocky planet detected by the Kepler satellite and confirmed with radial velocity follow-up observations from Keck-HIRES. The mass of the planet was measured with a precision of around 30%, which was insufficient to constrain models of its internal structure and composition in detail. In addition to Kepler-10b, a second planet transiting the same star with a period of 45 days was statistically validated, but the radial velocities were only good enough to set an upper limit of 20 M⊕ for the mass of Kepler-10c. To improve the precision on the mass for planet b, the HARPS-N Collaboration decided to observe Kepler-10 intensively with the HARPS-N spectrograph on the Telescopio Nazionale Galileo on La Palma. In total, 148 high-quality radial-velocity measurements were obtained over two observing seasons. These new data allow us to improve the precision of the mass determination for Kepler-10b to 15%. With a mass of 3.33±0.49 M⊕ and an updated radius of
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