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原文:
Like a ship plowing through cosmic seas, runaway star Zeta Ophiuchi produces the arcing interstellar bow wave or bow shock seen in this stunning infrared portrait. In the false-color view, bluish Zeta Oph, a star about 20 times more massive than the Sun, lies near the center of the frame, moving toward the left at 24 kilometers per second. Its strong stellar wind precedes it, compressing and heating the dusty interstellar material and shaping the curved shock front. Around it are clouds of relatively undisturbed material. What set this star in motion? Zeta Oph was likely once a member of a binary star system, its companion star was more massive and hence shorter lived. When the companion exploded as a supernova catastrophically losing mass, Zeta Oph was flung out of the system. About 460 light-years away, Zeta Oph is 65,000 times more luminous than the Sun and would be one of the brighter stars in the sky if it weren’t surrounded by obscuring dust. The image spans about 1.5 degrees or 12 light-years at the estimated distance of Zeta Ophiuchi.
中文翻譯:
像一艘船在宇宙海洋中航行，逃逸恆星 Zeta Ophiuchi 創造了這幅驚人紅外線肖像中可見的弓波或弓震。 在這幅假色圖像中，藍色的 Zeta Oph 是一顆大約比太陽重 20 倍的恆星，位於畫面的中央，正以每秒 24 公里的速度向左移動。它強大的恆星風在它前方出現，壓縮和加熱了塵埃的星際物質，塑造了彎曲的震前。周圍是相對未受擾動的物質雲。究竟是什麼使這顆恆星移動呢？Zeta Oph 很可能曾是一個雙星系統的成員，它的伴星更大且壽命更短。當伴星以超新星爆炸而大幅損失質量時，Zeta Oph 被彈飛出系統。距離地球約 460 光年，Zeta Oph 的光度是太陽的 65,000 倍，如果沒有被遮蔽塵埃圍繞，它將會是夜空中最亮的星星之一。這幅圖像在 Zeta Ophiuchi 的估計距離下寬約 1.5 度或 12 光年。
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來源:NASA每日圖片
