中文翻譯:
在遙遠的宇宙裡，有時候會發生兩次超新星爆炸！這就像是一個神秘的魔法表演。一顆大星星因為重力的關係，把一些星球上的物質給了一顆小小的白矮星。當這顆白矮星累積了很多能量時，它會爆炸，像噴出巨大的火花一樣，這一爆炸就是個開關，會引發更大的爆炸，形成一個完整的類型Ia超新星。最近，科學家們用智勇之光的望遠鏡觀察到了這個超新星殘骸，叫做SNR 0509-67.5。它就像兩個圓圓的大氣球，裡面有著不同的成分和半徑，看起來很像是這個神秘的雙重爆炸故事的證據！這個SNR 0509-67.5系統還有兩個迷人之謎：為什麼在400年前，沒有人注意到它的燦爛爆炸？還有，為什麼看不到陪伴的星星呢？
原文:
Can some supernovas explode twice? Yes, when the first explosion acts like a detonator for the second. This is a leading hypothesis for the cause of supernova remnant (SNR) 0509-67.5. In this two-star system, gravity causes the larger and fluffier star to give up mass to a smaller and denser white dwarf companion. Eventually the white dwarf’s near-surface temperature goes so high that it explodes, creating a shock wave that goes both out and in — and so triggers a full Type Ia supernova near the center. Recent images of the SNR 0509-67.5 system, like the featured image from the Very Large Telescope in Chile, show two shells with radii and compositions consistent with the double detonation hypothesis. This system, SNR 0509-67.5 is also famous for two standing mysteries: why its bright supernova wasn’t noted 400 years ago, and why no visible companion star remains.
來源:NASA每日圖片
