论文标题
在木星的上层大气中观察到的可能的瞬态发光事件
Possible Transient Luminous Events observed in Jupiter's upper atmosphere
论文作者
论文摘要
使用Juno航天器上的紫外线仪器在木星的大气中检测到11个瞬态明亮闪光。这些明亮的闪光仅在航天器的单个旋转中观察到，它们的亮度随时间呈指数衰减，持续时间约为1.4 ms。光谱以H2 Lyman带发射为主，并基于大气吸收水平，我们估计源高度高于1-BAR水平。基于这些特征，我们建议这些是木星上层大气中瞬时发光事件（TLE）的观察结果。特别是，我们建议这些是精灵，精灵或精灵光晕，这是对对流层雷击的三种类型的TLE，它们发生在地球上层大气中。这是由可见光成像支持的，可见光成像显示了几个明亮闪光的位置的闪电源区域的典型云特征。尽管理论和实验性工作已经预测，木星也应该存在于地球上，但TLE以前仅在地球上观察到。
11 transient bright flashes were detected in Jupiter's atmosphere using the UVS instrument on the Juno spacecraft. These bright flashes are only observed in a single spin of the spacecraft and their brightness decays exponentially with time, with a duration of ~1.4 ms. The spectra are dominated by H2 Lyman band emission and based on the level of atmospheric absorption, we estimate a source altitude of 260 km above the 1-bar level. Based on these characteristics, we suggest that these are observations of Transient Luminous Events (TLEs) in Jupiter's upper atmosphere. In particular, we suggest that these are elves, sprites or sprite halos, three types of TLEs that occur in the Earth's upper atmosphere in response to tropospheric lightning strikes. This is supported by visible light imaging, which shows cloud features typical of lightning source regions at the locations of several of the bright flashes. TLEs have previously only been observed on Earth, although theoretical and experimental work has predicted that they should also be present on Jupiter.
