M 82 :擁有超強星風的星暴星系
M82: Starburst Galaxy with a Superwind

來源:Arnaud Malleval|發表日期:2026-04-17
梅西耶 82 (M 82 )是一個擁有超風的星暴星系。事實上,透過超新星爆發和大質量恆星產生的強力恆星風,M 82 中的星形成爆發正驅動著一股巨大的外流。在這張清晰的望遠鏡影像中,來自該星系中心區域的超風跡象顯而易見。 這張合成影像融合了 33 小時的窄帶資料,突顯了原子氫氣體長長外流絲狀結構發出的紅褐色光芒。超風中部分富含由大質量恆星鍛造出的重元素的氣體,最終將逃逸到星系際空間。 M 82 星系中這場劇烈的恆星形成爆發是由與鄰近的大型星系M 81 的近距離接觸觸發的,預計將持續約 1 億年。M 82 因其細長的外觀也被稱為“雪茄星系”,其直徑約為 3 萬光年。它位於大熊座北邊界附近,距離地球 1200 萬光年。
原文:Messier 82 is a starburst galaxy with a superwind. In fact, through supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow. Evidence for the superwind from the galaxy's central regions is clear in the sharp telescopic portrait. The composite image includes 33 hours of narrowband data, highlighting emission from long outflow filaments of atomic hydrogen gas in reddish hues. Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space. Triggered by a close encounter with nearby large galaxy M81, the furious burst of star formation in M82 should last about 100 million years or so. Also known as the Cigar Galaxy for its elongated visual appearance, M82 is about 30,000 light-years across. It lies 12 million light-years away near the northern boundary of Ursa Major.
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