澤塔奧夫:失控之星
Zeta Oph: Runaway Star

發表日期:2024-01-04
失控恆星 Zeta Ophiuchi 就像一艘在宇宙海洋中航行的船隻,在這幅令人驚歎的紅外影像中產生了星際弓形波或弓形衝擊。在假彩色檢視中,藍色的 Zeta Oph 是一顆質量約為太陽 20 倍的恆星,位於畫面中心附近,以每秒 24 公里的速度向左移動。強大的恆星風緊隨其後,壓縮並加熱了星際塵埃物質,形成了彎曲的衝擊前沿。是什麼讓這顆恆星運動起來的呢?Zeta Oph 很可能曾經是一個雙星系統的成員,它的伴星質量更大,因此壽命更短。當這顆伴星以超新星的形式爆炸,質量急劇下降時,Zeta Oph 就被甩出了雙星系統。 Zeta Oph 距太陽約 460 光年,它的亮度是太陽的 65000 倍,如果不是被塵埃遮擋,它將成為天空中最亮的恆星之一。這幅影像的跨度約為 1 . 5 度,即歐菲茲塔的估計距離為 12 光年。 2020 年 1 月,美國國家航空航天局將斯皮策太空望遠鏡置於安全模式,結束了它長達 16 年對宇宙的成功探索。
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. 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. In January 2020, NASA placed the Spitzer Space Telescope in safe mode, ending its 16 successful years of exploring the cosmos.
※ 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!
關於每日一天文圖:每日一天文圖網站是美國國家航空暨太空總署與密西根理工大學提供的服務,網站每天提供一張影像或圖片,並由天文學家撰寫扼要說明其特別之處。