M 83 :星流與千顆紅寶石
M83: Star Streams and a Thousand Rubies

來源:Michael Sidonio|發表日期:2024-07-03
螺旋星系 M 83 又大又亮又美,位於一千二百萬光年之外,靠近很長的水螅座的東南端。M 83 的直徑約為 4 萬光年,因其明顯的旋臂而被稱為 "南針輪"。不過,在旋臂邊緣厚厚的塵埃通道附近發現的大量紅色恆星形成區,也為 M 83 帶來了另一個流行的稱號--千紅星系(Thousand-Ruby Galaxy)。這幅新的深度望遠鏡數字影像還記錄了這個明亮星系的微弱、延伸的光暈。在宇宙框架的底部有一個恆星潮汐流,它是由一個較小的合併衛星星系的引力破壞而從大質量的 M 83 星系引出的碎片。天文學家大衛-馬林(David Malin)和布萊恩-哈德利(Brian Hadley)在 20 世紀 90 年代中期透過增強照相製版發現了這一難以捉摸的恆星流。
原文:Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million light-years away, near the southeastern tip of the very long constellation Hydra. About 40,000 light-years across, M83 is known as the Southern Pinwheel for its pronounced spiral arms. But the wealth of reddish star forming regions found near the edges of the arms' thick dust lanes, also suggest another popular moniker for M83, the Thousand-Ruby Galaxy. This new deep telescopic digital image also records the bright galaxy's faint, extended halo. Arcing toward the bottom of the cosmic frame lies a stellar tidal stream, debris drawn from massive M83 by the gravitational disruption of a smaller, merging satellite galaxy. Astronomers David Malin and Brian Hadley found the elusive star stream in the mid 1990s by enhancing photographic plates.
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