论文标题
使用Galex在紫外线中对星空星际相互作用进行统计搜索
A statistical search for Star-Planet Interaction in the UltraViolet using GALEX
论文作者
论文摘要
当今已知的4000多个已知的超过4000多个系外行星中，大多数（约82％）非常接近其宿主星，在0.5 au之内。在如此小的轨道距离处的行星可能会导致其宿主恒星的显着相互作用，从而导致其活动水平提高。在这项工作中，我们使用了1355 Galex检测到的宿主星的最大样本，并利用了改进的gaia dr2的宿主星参数。从我们的分析中，我们发现宿主恒星的紫外线活性与它们的行星特性之间没有任何显着相关性。我们进一步比较了行星宿主恒星的紫外线特性与Rave调查中的色球活性恒星的特性。我们的结果表明，由于星形行星相互作用而引起的宿主恒星的色球活性的增强可能不足以反映其近乎紫外线宽带通量。
Most (~82%) of the over 4000 confirmed exoplanets known today orbit very close to their host stars, within 0.5 au. Planets at such small orbital distances can result in significant interactions with their host stars, which can induce increased activity levels in them. In this work, we have searched for statistical evidence for Star-Planet Interactions (SPI) in the ultraviolet (UV) using the largest sample of 1355 GALEX detected host stars with confirmed exoplanets and making use of the improved host star parameters from Gaia DR2. From our analysis, we do not find any significant correlation between the UV activity of the host stars and their planetary properties. We further compared the UV properties of planet host stars to that of chromospherically active stars from the RAVE survey. Our results indicate that the enhancement in chromospheric activity of host stars due to star-planet interactions may not be significant enough to reflect in their near and far UV broad band flux.
