Copyright:
原文:
How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, making it one of the most massive stars known. This star is the brightest object located just above the gas front in the featured image. Close inspection of images taken with the Hubble Space Telescope, however, have shown that Pismis 24-1 derives its brilliant luminosity not from a single star but from three at least. Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record. Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357. Appearing perhaps like a Gothic cathedral, energetic stars near the center appear to be breaking out and illuminating a spectacular cocoon.
中文翻譯:
在正常星體中，最大的質量上限一直是一個重要的天文學問題。根據距離、亮度和標準太陽模型的估算，位於開放星團 Pismis 24 的一顆星被認為擁有超過 200 倍於我們太陽的質量，成為已知最巨大的星體之一。不過，近來使用哈勃太空望遠鏡拍攝的圖像顯示，Pismis 24-1 的絢麗光輝並非來自一顆單一的星，而是至少由三顆星組成。這些成分星的質量依然接近 100 倍於太陽，使它們成為當前記錄中最巨大的星體之一。在圖像底部，與發射星雲 NGC 6357 相關的區域仍在形成新星，中央的活躍星體似乎正在突破並照亮一個壯觀的繭狀結構，宛如一座哥德式大教堂。
#星際之美 #Pismis24 #哈勃望遠鏡 #天文學 #星體形成 #宇宙奇觀 #NGC6357
來源:NASA每日圖片
