史提夫：法国上空一条发光的河
(原标题: STEVE: A Glowing River over France)
2024-10-28
浏览次数: 11
有时，热气河从你的头顶流过。在这种情况下，河流产生了强烈的热发射速度增强（STEVE），发出明亮的红色，白色和粉红色。关于steve如何工作的细节仍然是一个研究课题，但最近的证据表明，它们的发光来自一条快速移动的热离子河，它在地球大气层中向上流动了一百多公里：电离层。更广泛的暗红色辉光可能与流动的STEVE有关，但也可能是稳定的极光红（SAR）弧，一种更普遍的与热有关的辉光。这张特色照片是本月早些时候在法国Côte d'Opale拍摄的，是在史蒂夫弧线几乎在头顶形成时拍摄的广角数码合成照片。虽然这一现象只持续了几分钟，但对于思维敏捷的天文摄影师来说，这已经足够长了——你能找到他吗？
查看原文解释
Sometimes a river of hot gas flows over your head. In this case the river created a Strong Thermal Emission Velocity Enhancement (STEVE) that glowed bright red, white, and pink. Details of how STEVEs work remain a topic of research, but recent evidence holds that their glow results from a fast-moving river of hot ions flowing over a hundred kilometers up in the Earth's atmosphere: the ionosphere. The more expansive dull red glow might be related to the flowing STEVE, but alternatively might be a Stable Auroral Red (SAR) arc, a more general heat-related glow. The featured picture, taken earlier this month in Côte d'Opale, France, is a wide-angle digital composite made as the STEVE arc formed nearly overhead. Although the apparition lasted only a few minutes, this was long enough for the quick-thinking astrophotographer to get in the picture -- can you find him?
© Louis LEROUX-GÉRÉ