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arXiv 0711.3140astro-ph
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超新星遗迹N132D的X射线发射

X-Ray Emitting Ejecta of Supernova Remnant N132D

Kazimierz J. Borkowski, Sean P. Hendrick, Stephen P. Reynolds

摘要:

麦哲伦星云中最明亮的超新星遗迹,N132 D,属于罕见的富氧遗迹,大约有十几个物体显示纯重元素喷出物的光学发射。它们起源于大质量恒星的爆炸,产生大量的O,尽管只有一小部分O被发现以光学波长发射。我们报告说,在最近对N132 D进行的100 ks Chandra ACIS观测中,在X射线波长处检测到了大量的O。亚角秒分辨率的钱德拉和哈勃图像之间的比较显示,在大尺度(但不是小尺度)上,星云X射线和光学发射的喷出物之间有很好的匹配。喷出物光谱占主导地位的强线,他和H-类O,他们表现出大量的空间变化,部分造成的LMC内的斑片状吸收。由于光学喷出物集中在一个5 pc半径的椭圆形膨胀壳,检测到的喷出物X射线发射也起源于这个壳。

英文摘要:

The brightest supernova remnant in the Magellanic Clouds, N132D, belongs to the rare class of oxygen-rich remnants, about a dozen objects that show optical emission from pure heavy-element ejecta. They originate in explosions of massive stars that produce large amounts of O, although only a tiny fraction of that O is found to emit at optical wavelengths. We report the detection of substantial amounts of O at X-ray wavelengths in a recent 100 ks Chandra ACIS observation of N132D. A comparison between subarcsecond-resolution Chandra and Hubble images reveals a good match between clumpy X-ray and optically emitting ejecta on large (but not small) scales. Ejecta spectra are dominated by strong lines of He- and H-like O; they exhibit substantial spatial variations partially caused by patchy absorption within the LMC. Because optical ejecta are concentrated in a 5 pc radius elliptical expanding shell, the detected ejecta X-ray emission also originates in this shell.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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