黑斯望远镜探索高能波段的天空

2023年9月6日

HESS Telescopes Explore the High-Energy Sky
Credit & Copyright: Video Credit & Copyright: Jeff Dai (TWAN), H.E.S.S. Collaboration;
Music: Ibaotu catalog number 1044988 (Used with permission)

Explanation: They may look like modern mechanical dinosaurs, but they are enormous swiveling eyes that watch the sky. The High Energy Stereoscopic System (H.E.S.S.) Observatory is composed of four 12-meter reflecting-mirror telescopes surrounding a larger telescope housing a 28-meter mirror. They are designed to detect strange flickers of blue light — Cherenkov radiation –emitted when charged particles move slightly faster than the speed of light in air. This light is emitted when a gamma ray from a distant source strikes a molecule in Earth’s atmosphere and starts a charged-particle shower. H.E.S.S. is sensitive to some of the highest energy photons (TeV) crossing the universe. Operating since 2003 in Namibia, H.E.S.S. has searched for dark matter and has discovered over 50 sources emitting high energy radiation including supernova remnants and the centers of galaxies that contain supermassive black holes. Pictured in June, H.E.S.S. telescopes swivel and stare in time-lapse sequences shot in front of our Milky Way Galaxy and the Magellanic Clouds — as the occasional Earth-orbiting satellite zips by.

Surf the Universe: Random APOD Generator

Tomorrow’s picture: large star cloud

黑斯望远镜探索高能波段的天空
影像、影片提供与版权: Jeff Dai（戴建峰） (TWAN), H.E.S.S. Collaboration;
配乐: Ibaotu catalog number 1044988 (Used with permission)

说明: 这些或许看起来很像现代机械恐龙的装置，是监探天空的旋转巨眼。黑斯望远镜 (HESS；高能立体视野望远镜)，是由4座12米口径的反射式望远镜，与及它们中心环拱的一座较大口径28米望远镜所共同组成。它们是设计来侦测名为切伦科夫辐射的奇特蓝光亮闪，这种辐射是带电粒子，在空气中移动的速度略高于空气中的光速时所产生的。整体来说，当来自遥远辐射源的伽玛射线撞击地球大气的分子，造成带电粒子簇射就会产生切伦科夫辐射。黑斯望远镜能侦测来自宇宙深处，能量高达兆电子伏特（TeV）的高能光子。座落于纳米比亚、自2003年就开始运转的黑斯望远镜，任务标的是要搜寻暗物质，并且已找到超过50个会发出高能辐射的辐射源，其中包括超新星遗迹和内藏超大质量黑洞的星系核。在上面这部以银河系及大、小麦哲伦星系为背景所拍摄的延时影片里，黑斯望远镜回旋和凝视，而视野里也偶而会出现飞掠而过的地球人造卫星。

宇宙冲浪: 随机APOD生成器

明日的图片: large star cloud