论文标题
年轻有源M型war的过境可检测性的颜色依赖性
Color Dependence of the Transit Detectability for Young Active M-dwarfs
论文作者
论文摘要
我们研究了在恒星旋转活性的情况下，从光曲线中研究了行星传输的可检测性，并在近红外（NIR）波长下估计检测的改善。在轨道周期和行星半径上，用K2任务观察到的四个簇，hyades，praesepe，pleiades和上天蝎座的成员的光曲线在轨道时期和行星半径上制作映射。我们发现，对于p_ {rot} <= 1 d的快速旋转器，检测效率明显降至约20％，而pleiades中缺乏行星可能是由于迅速旋转的M-warfs的高分子所致。我们还使用模拟光曲线测试通过测试来评估行星检测的改进，假设恒星旋转的信号幅度在NIR波长下降低。我们的结果表明，NIR光度监测将对具有P_ {ROT} <= 1 D的过渡行星候选者进行双重相对检测效率，并在M-dwarfs周围找到行星，在过去的过境中，大约100 MYR丢失了100 MYR。
We investigate the planetary transit detectability in the presence of stellar rotational activity from light curves for young M-dwarfs and estimate improvements of the detection at near-infrared (NIR) wavelengths. Making maps of the transit signal detection efficiency over the orbital period and planetary radius with light curves of members of four clusters, Hyades, Praesepe, Pleiades, and Upper Scorpius observed by the K2 mission, we evaluate the detectability for the rotation period and modulation semi-amplitude. We find that the detection efficiency remarkably decreases to about 20% for rapidly rotators with P_{rot} <= 1 d and the lack of planets in Pleiades is likely due to the high fraction of rapidly rotating M-dwarfs. We also evaluate the improvements of the planet detection with NIR photometry via tests using mock light curves assuming that the signal amplitude of stellar rotation decreases at NIR wavelengths. Our results suggest that NIR photometric monitoring would double relative detection efficiency for transiting planetary candidates with P_{rot} <= 1 d and find planets around M-dwarfs with approximately 100 Myr missing in the past transit surveys from the space.
