论文标题
使用HST的LMC超新星残留N103B的图像和紫外线光谱
Imagery and UV Spectroscopy of the LMC Supernova Remnant N103B Using HST
论文作者
论文摘要
我们介绍了N103B的HST/WFC3多曲线图像，这是大型麦哲伦云中IA型超新星的残留物，以及最明亮的辐射冲击区域的HST/COS紫外线光谱。这些图像显示了广泛的形态和相对发射线强度，从光滑的Balmer线占主导地位的无碰撞冲击，到由于密度增强的继发性冲击而引起的块状辐射冲击丝。 COS数据显示，尽管沿着这条视线呈中等高度灭绝，但FUV线的发射强。我们将COS数据与先前的光谱一起使用来限制冲击条件并完善丰度分析，从而发现不确定性内局部星际介质的典型丰度。在假设所震惊的材料是从苏佩诺诺娃（Supernova）系统中脱落的，这一发现对该材料的任何显着富集都构成了限制，因此在非分类恒星中对可能是单脱酸盐类型的IA Supernova的限制。
We present HST/WFC3 multiband imagery of N103B, the remnant of a Type Ia supernova in the Large Magellanic Cloud, as well as HST/COS ultraviolet spectroscopy of the brightest radiatively shocked region. The images show a wide range of morphology and relative emission-line intensities, from smooth Balmer-line dominated collisionless shocks due to the primary blast wave, to clumpy radiative shock filaments due to secondary shocks in density enhancements. The COS data show strong FUV line emission despite a moderately high extinction along this line of sight. We use the COS data with previous optical spectra to constrain the shock conditions and refine the abundance analysis, finding abundances typical of the local interstellar medium within the uncertainties. Under an assumption that the material being shocked was shed from the pre-supernova system, this finding places constraints on any significant enrichment in that material, and thus on the non-degenerate star in what was presumably a single-degenerate Type Ia supernova.
