揭開 NGC 3169 的神秘面紗
Unraveling NGC 3169

來源:Christophe Vergnes|發表日期:2024-05-23
螺旋星系 NGC 3169 看起來就像一團宇宙紗線正在解開。它位於大約 7000 萬光年之外,明亮的軒轅恆星以南,朝向暗淡的六分儀星座。當 NGC 3169 (左)和鄰近的 NGC 3166 發生引力相互作用時,纏繞在一起的旋臂被拉出,形成了一條橫掃的潮汐尾巴。最終,這兩個星系將合二為一,這甚至是本宇宙中明亮星系的共同命運。拉出的恆星弧線和羽流清楚地表明,在這張色彩斑斕的深邃星系群照片中,引力相互作用仍在繼續。望遠鏡框架的跨度約為 20 角分,按該星系群的估計距離計算,約為 40 萬光年,其中包括右側較小、呈藍色的NGC 3165 。據瞭解,NGC 3169 還閃耀著從射電到 X 射線的各種光譜,其中蘊藏著一個活躍的星系核,它是一個超大質量黑洞的所在地。
原文:Spiral galaxy NGC 3169 looks to be unraveling like a ball of cosmic yarn. It lies some 70 million light-years away, south of bright star Regulus toward the faint constellation Sextans. Wound up spiral arms are pulled out into sweeping tidal tails as NGC 3169 (left) and neighboring NGC 3166 interact gravitationally. Eventually the galaxies will merge into one, a common fate even for bright galaxies in the local universe. Drawn out stellar arcs and plumes are clear indications of the ongoing gravitational interactions across the deep and colorful galaxy group photo. The telescopic frame spans about 20 arc minutes or about 400,000 light-years at the group's estimated distance, and includes smaller, bluish NGC 3165 to the right. NGC 3169 is also known to shine across the spectrum from radio to X-rays, harboring an active galactic nucleus that is the site of a supermassive black hole.
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