Observation of Jovian Visible Aurora and its Generation Mechanism

我们在地面望远镜上建立了一个由CCD和窄带滤光片组成的木星可见极光和气辉光学观测系统。这些排放物从未从地面测量过。从1999年到2001年，我们分别使用陆别望远镜110cm、lied60cm望远镜和北海道大学10cm望远镜进行了观测。我们还开发了一种成像处理系统，可以分析短曝光时间拍摄的木星图像并进行集成。我们在木星的北部地区发现了一些排放物。我们的系统或许可以用于探测来自行星或气辉的非常微弱的信号。我们已经从理论上研究了木星、金星、地球和火星的大气层。结果表明，与云层和等离子体的相互作用对行星大气很重要。特别是在高海拔地区，必须考虑到行星上层大气中的离子阻力效应。

We have built an optical observation system of Jovian visible aurora and airglow, which consists of CCD and narrow band filter on ground-based telescope. The emissions have never been measured from ground. We have carried out the observations by use of Rikubetsu 110cm telescope, lidate 60cm telescope and Hokkaido University 10cm telescope from 1999 to 2001. We have also developed an imaging processing system that analyzes the image of Jupiter taken with short exposure time and integrated. We found some emissions in the northern region of Jupiter. Our system may be able to apply to detect very weak signals from planets or airglow.We have investigated theoretically the atmosphere of Jupiter as well as Venus, Earth and Mars. The results suggested that the interactions with clouds and plasma are important to planetary atmospheres. Especially, at high altitudes the ion-drag effect must be considered in the planetary upper atmospheres.