寻找M矮星碎片盘宿主AU Microscopii的行星
A Search for Planets Transiting the M Dwarf Debris Disk Host, AU Microscopii
摘要：
我们提出了高节奏，高精度的多波段测光的年轻，M1Ve，碎片盘星，AU显微镜。这些数据是在2005年的28个晚上，在波长范围从4500 nm到6600 nm的三个连续滤光片加上H $α$中获得的。光变曲线显示了恒星的内在变化，这是由于恒星黑子的振幅在蓝波段为0.051等，周期为4.847天。此外，在数据中检测到三个大的耀斑，它们都发生在恒星的最低亮度附近。我们删除的内在恒星的变化，并结合所有的过滤器的光变曲线，以寻找过境的可能的行星同伴轨道上的飞机的近边缘的碎片盘。组合的最终光变曲线的采样时间为0.35分钟，标准偏差为6.8毫马格（mmag）。我们进行了蒙特卡罗模拟，通过添加假过境所观察到的光变曲线，并发现有95%的意义，有没有木星质量的行星轨道在平面上的碎片盘的圆形轨道周期，P $\le 5$天。此外，没有年轻的类海王星行星（半径比年轻的木星小2.5 $\times$）在周期为P $\le 3$天的圆形轨道上。
英文摘要：
We present high cadence, high precision multi-band photometry of the young, M1Ve, debris disk star, AU Microscopii. The data were obtained in three continuum filters spanning a wavelength range from 4500Åto 6600Å, plus H$α$, over 28 nights in 2005. The lightcurves show intrinsic stellar variability due to starspots with an amplitude in the blue band of 0.051 magnitudes and a period of 4.847 days. In addition, three large flares were detected in the data which all occur near the minimum brightness of the star. We remove the intrinsic stellar variability and combine the lightcurves of all the filters in order to search for transits by possible planetary companions orbiting in the plane of the nearly edge-on debris disk. The combined final lightcurve has a sampling of 0.35 minutes and a standard deviation of 6.8 millimags (mmag). We performed Monte Carlo simulations by adding fake transits to the observed lightcurve and find with 95% significance that there are no Jupiter mass planets orbiting in the plane of the debris disk on circular orbits with periods, P $\le 5$ days. In addition, there are no young Neptune-like planets (with radii 2.5$\times$ smaller than the young Jupiter) on circular orbits with periods, P $\le 3$ days.
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