史蒂夫:法國上空一條發光的河流
STEVE: A Glowing River over France
來源:Louis LEROUX-GÉRÉ|發表日期:2024-10-28
有時,一條熱氣河會從你頭頂流過。在這種情況下,河流會產生強熱發射速度增強(STEVE),發出明亮的紅色、白色和粉紅色光芒。有關 STEVE 工作原理的細節仍是一個研究課題,但最近的證據表明,它們的光芒來自於地球大氣層(即電離層)中一條快速流動的熱離子河,這條河的最高處超過 100 公里。更廣闊的暗紅色輝光可能與流動的 STEVE 有關,但也可能是穩定極光紅(SAR)弧,一種更普遍的與熱有關的輝光。本月早些時候在法國科帕萊拍攝的這張照片是在 STEVE 弧幾乎在頭頂形成時拍攝的廣角數字合成照片。 雖然弧光只持續了幾分鐘,但足夠讓思維敏捷的天文攝影師拍到照片了--你能找到他嗎?
原文: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?
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。