论文标题
超级轨道的多个行星系统绕着最亮的红色矮人恒星GJ887
A multiple planet system of super-Earths orbiting the brightest red dwarf star GJ887
论文作者
论文摘要
与太阳的最近的系外行星是我们详细表征的最佳可能性。我们使用径向速度测量值报告了紧凑的超货币的紧凑型多行星系统。行星的轨道周期为9.3和21.8〜天。假设具有地球样反照率，21.8天行星的平衡温度约为350 K；它是内部的，但靠近液态 - 水宜居区的内边缘。我们还检测到50天的进一步未经证实的信号，这可能对应于更温和的轨道中的第三个超级地球。 GJ 887是一种异常磁性的安静的红色矮人，光度变异性低于5000万，使其行星可与相位分辨的光度法表征相提并论。
The nearest exoplanets to the Sun are our best possibilities for detailed characterization. We report the discovery of a compact multi-planet system of super-Earths orbiting the nearby red dwarf GJ 887, using radial velocity measurements. The planets have orbital periods of 9.3 and 21.8~days. Assuming an Earth-like albedo, the equilibrium temperature of the 21.8 day planet is approx 350 K; which is interior, but close to the inner edge, of the liquid-water habitable zone. We also detect a further unconfirmed signal with a period of 50 days which could correspond to a third super-Earth in a more temperate orbit. GJ 887 is an unusually magnetically quiet red dwarf with a photometric variability below 500 parts-per-million, making its planets amenable to phase-resolved photometric characterization.
