费米的12年全天伽马射线图
(原标题: Fermi's 12-year All-Sky Gamma-ray Map)
2024-08-21
浏览次数: 12
忘记x射线视觉吧——想象一下你用伽马射线视觉能看到什么！这张特色的全天地图显示了美国宇航局费米伽马射线太空望远镜拍摄到的宇宙的样子。费米望远镜看到的光的能量大约是人眼所能看到的10亿倍，这张图结合了费米望远镜12年来的观测结果。这些颜色代表了伽玛射线源的亮度，较亮的伽玛射线源的颜色较浅。中间突出的条纹是我们银河系的中心平面。大多数散布在银河系平面上下的红色和黄色点是非常遥远的星系，而平面内的大多数是附近的脉冲星。填充图像的蓝色背景是来自遥远来源的伽马射线的漫射光，这些射线太暗而无法单独检测到。一些伽玛射线源仍然是未知的和研究的主题——目前没有人知道它们是什么。
查看原文解释
Forget X-ray vision — imagine what you could see with gamma-ray vision! The featured all-sky map shows what the universe looks like to NASA's Fermi Gamma-ray Space Telescope. Fermi sees light with energies about a billion times what the human eye can see, and the map combines 12 years of Fermi observations. The colors represent the brightness of the gamma-ray sources, with brighter sources appearing lighter in color. The prominent stripe across the middle is the central plane of our Milky Way galaxy. Most of the red and yellow dots scattered above and below the Milky Way’s plane are very distant galaxies, while most of those within the plane are nearby pulsars. The blue background that fills the image is the diffuse glow of gamma-rays from distant sources that are too dim to be detected individually. Some gamma-ray sources remain unidentified and topics of research — currently no one knows what they are.