论文标题
大麦芽云中超新星残留DEM L71的空间分辨的Chandra光谱
Spatially Resolved Chandra Spectroscopy of Supernova Remnant DEM L71 in the Large Magellanic Cloud
论文作者
论文摘要
我们提出了一项详细的X射线光谱研究，对大麦芽云中的超新星残留DEM L71。基于Deep $ \ sim 103 $ KS档案{\ it chandra}数据，我们对DEM L71进行了详细的空间解析光谱分析。我们分析了SNR的几个不同方位角从薄切区域提取的区域光谱，以构建O，NE，MG，SI和Fe的元素丰度的径向谱。我们的元素丰度测量结果表明，金属富集气体的不对称空间分布。特别是中央铁分布西部的不对称性是显着的。虽然触点不连续的位置通常位于$ \ sim 5 $ 5 $ PC，从DEM L71的X射线发射的几何中心中心，但在残留的西部尚不确定。弹出中的Fe增强了，而O和NE的丰度通常可以忽略不计。这一发现证实了DEM L71的IA型起源。我们估计$ \ sim 6,660 \ pm 770 $ yr和$ \ sim 1.74 \ pm 0.35 \ pm 0.35 \ times 10^{51} $ erg的上限。这种爆炸能量估计与IA型超新星残留物的规范爆炸一致。
We present a detailed X-ray spectroscopic study of the supernova remnant DEM L71 in the Large Magellanic Cloud. Based on deep $\sim 103$ ks archival {\it Chandra} data, we perform a detailed spatially resolved spectral analysis of DEM L71. We analyze regional spectra extracted from thin-sliced regions along several different azimuthal directions of the SNR to construct radial profiles of elemental abundances for O, Ne, Mg, Si, and Fe. Our elemental abundance measurements reveal an asymmetrical spatial distribution of metal-rich ejecta gas. Especially the asymmetry on the western part of the central Fe distribution is remarkable. While the location of the contact discontinuity is generally at $\sim 5$ pc from the geometric center of the X-ray emission of DEM L71, it is uncertain in western part of the remnant. Fe is enhanced in the ejecta while O and Ne abundances are generally negligible. This finding confirms the Type Ia origin of DEM L71. We estimate an upper limit on the Sedov age of $\sim 6,660\pm 770$ yr and explosion energy of $\sim 1.74\pm 0.35\times 10^{51}$ erg for the remnant. This explosion energy estimate is consistent with a canonical explosion of a Type Ia supernova remnant.
