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SN Refsdal: The First Predicted Supernova Image

SN Refsdal: The First Predicted Supernova Image
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原文:
It’s back. Never before has an observed supernova been predicted. The unique astronomical event occurred in the field of galaxy cluster MACS J1149.5+2223. Most bright spots in the featured image are galaxies in this cluster. The actual supernova, dubbed Supernova Refsdal, occurred just once far across the universe and well behind this massive galaxy cluster. Gravity caused the cluster to act as a massive gravitational lens, splitting the image of Supernova Refsdal into multiple bright images. One of these images arrived at Earth about ten years ago, likely in the upper red circle, and was missed. Four more bright images peaked in April in the lowest red circle, spread around a massive galaxy in the cluster as the first Einstein Cross supernova. But there was more. Analyses revealed that a sixth bright supernova image was likely still on its way to Earth and likely to arrive within the next year. Earlier this month — right on schedule — this sixth bright image was recovered, in the middle red circle, as predicted. Studying image sequences like this help humanity to understand how matter is distributed in galaxies and clusters, how fast the universe expands, and how massive stars explode. Follow APOD on: Facebook, Google Plus, or Twitter
中文翻譯:
🌌✨ 它回來了!從未有過的觀測超新星被預測出現。這一獨特的天文事件發生在星系團 MACS J1149.5+2223 的領域中。圖片中大多數亮點是這個星系團中的星系。實際的超新星,稱為 Supernova Refsdal,遠在宇宙彼端,位於一個巨大的星系後面。重力使這個星系團像一個巨大的重力透鏡,將 Supernova Refsdal 的影像分裂成多個明亮的影像。

其中一幅影像大約十年前抵達地球,可能在上方紅圈中,但被忽略了。其餘四幅明亮影像在四月達到高峰,分布在星系團中一個巨大的星系周圍,成為第一個愛因斯坦十字超新星。更精彩的是,分析顯示第六幅明亮的超新星影像可能還在路上,預計在接下來的一年內抵達。

就在本月——正如預測的那樣——第六幅亮麗影像在中間紅圈中被重新捕捉到,完美符合預期。研究這樣的影像序列幫助人類了解星系和星系團中物質的分佈、宇宙的膨脹速度及大質量恆星的爆炸過程。

#SupernovaRefsdal #天文學 #重力透鏡 #宇宙探索 #星系團 #黑暗物質 #愛因斯坦十字 #天文現象 #科學發現 #宇宙之謎

來源:NASA每日圖片

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