The Discovery of a Spatially Resolved Supernova Remnant in M31 with Chandra
The Discovery of a Spatially Resolved Supernova Remnant in M31 with Chandra
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与钱德拉一起发现 M31 中空间分辨的超新星遗迹
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
S. Murray
中科院分区：
文献类型：
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作者：
A. Kong;Michael R. Garcia;F. Primini;S. Murray
钱德拉对M31的观测使我们获得了第一张外部螺旋星系中超新星遗迹（SNR）的空间分辨x射线图像。CXOM31 J004327.7+411829是一个直径约11' （42 pc）的细长环状物体。此外，x射线图像暗示，信噪比的化学成分是空间相关的。信噪比的x射线谱可以很好地用雷蒙德-史密斯模型或非平衡电离模型拟合。根据光谱模型的不同，0.3-7 keV的光度在3.2 × 1036 ~ 4.5 × 1037 ergs -1之间。信噪比估计年龄为3210 ~ 22300 yr，环境气体数密度为~0.003 ~ 0.3 cm-3。这表明，在信噪比周围的本地星际介质很低。
Chandra observations of M31 allow the first spatially resolved X-ray image of a supernova remnant (SNR) in an external spiral galaxy. CXOM31 J004327.7+411829 is a slightly elongated ring-shaped object with a diameter of ~11' (42 pc). In addition, the X-ray image hints that the chemical composition of the SNR is spatial dependent. The X-ray spectrum of the SNR can be well fitted with a Raymond-Smith model or a nonequilibrium ionization model. Depending on the spectral model, the 0.3-7 keV luminosity is between 3.2 × 1036 and 4.5 × 1037 ergs s-1. The age of the SNR is estimated to be 3210-22,300 yr, and the number density of ambient gas is ~0.003-0.3 cm-3. This suggests that the local interstellar medium around the SNR is low.