年輕星團 NGC 346
Young Star Cluster NGC 346

發表日期:2025-05-02
小麥哲倫雲中質量最大的年輕星團是NGC 346 ,它位於我們這個小衛星星系最大的恆星形成區域中,距離我們大約 21 萬光年。當然,NGC 346 的大質量恆星壽命很短,但能量卻非常大。 它們的風和輻射鵰刻了該區域塵埃分子云的邊緣,引發了內部恆星的形成。恆星形成區域似乎還包含了大量的幼年恆星。這些幼年恆星只有 300 萬到 500 萬年的年齡,它們的核心還沒有燃燒氫氣,散佈在嵌入的星團中。NGC 346 的壯觀紅外景象來自詹姆斯-韋伯太空望遠鏡的近紅外攝像頭。大質量恆星的高能輻射電離出的原子氫,以及恆星形成的分子云中的分子氫和塵埃發出的輻射,呈現出粉紅色和橙色的色調。韋伯望遠鏡拍攝到的年輕恆星形成區的清晰影像與小麥哲倫雲相距 240 光年。
原文:The most massive young star cluster in the Small Magellanic Cloud is NGC 346, embedded in our small satellite galaxy's largest star forming region some 210,000 light-years distant. Of course the massive stars of NGC 346 are short lived, but very energetic. Their winds and radiation sculpt the edges of the region's dusty molecular cloud triggering star-formation within. The star forming region also appears to contain a large population of infant stars. A mere 3 to 5 million years old and not yet burning hydrogen in their cores, the infant stars are strewn about the embedded star cluster. This spectacular infrared view of NGC 346 is from the James Webb Space Telescope's NIRcam. Emission from atomic hydrogen ionized by the massive stars' energetic radiation as well as molecular hydrogen and dust in the star-forming molecular cloud is detailed in pink and orange hues. Webb's sharp image of the young star-forming region spans 240 light-years at the distance of the Small Magellanic Cloud.
※ 本文由萌芽機器人自動轉貼自每日一天文圖(Astronomy Picture of the Day,APOD),原文為英文,正體中文是透過 DeepL 翻譯及 OpenCC 進行自動處理,內容僅供參考,若有任何錯誤之處還請見諒!
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