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原文:
Circinus X-1 is an X-ray binary star known for its erratic variability. In the bizarre Circinus X-1 system, a dense neutron star, the collapsed remnant of a supernova explosion, orbits with a more ordinary stellar companion. Observations of the X-ray binary in months following an intense X-ray flare from the source in 2013 progressively revealed striking concentric rings – bright X-ray light echoes from four intervening clouds of interstellar dust. In this X-ray/optical composite, the swaths of Chandra Observatory X-ray image data showing partial outlines of the rings are in false colors. Remarkably, timing the X-ray echoes, along with known distances to the interstellar dust clouds, determines the formerly highly uncertain distance to Circinus X-1 itself to be 30,700 light-years.
中文翻譯:
Circinus X-1 是一個以其不規則變化出名的 X 射線雙星系統。在這個奇特的 Circinus X-1 系統中，一顆致密的中子星，這是一次超新星爆炸後的塌陷殘骸，與一顆較普通的恆星伴侶公轉。2013 年，這個 X 射線雙星發生了一次強烈的 X 射線閃光，之後的幾個月觀測顯示出驚人的同心圓環——來自四個介於之間的星際塵埃雲的明亮 X 射線光回聲。在這幅 X 射線/光學合成圖像中，使用 Chandra 天文台的 X 射線數據顯示的圓環部分外輪廓呈假色。令人驚訝的是，通過計時 X 射線回聲，加上已知的星際塵埃雲距離，確定了原本高度不確定的 Circinus X-1 本身距離為 30,700 光年。
#CircinusX1 #XrayBinary #NeutronStar #Astrophysics #XrayEchoes #SpaceExploration #ChandraObservatory #InterstellarDust #Universe #Astronomy #ScienceFacts
來源:NASA每日圖片
