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arXiv 1502.04374astro-ph.HE
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核心坍缩超新星祖先的模型与超新星遗迹的性质一致吗?

Are Models for Core-Collapse Supernova Progenitors Consistent with the Properties of Supernova Remnants?

Daniel J. Patnaude, Shiu-Hang Lee, Patrick O. Slane, Carles Badenes, Alexander Heger, Donald C. Ellison, Shigehiro Nagataki

摘要:

最近的发现,在附近的SNR观测到的铁-钾线光度和能量质心是一个很强的判别祖星类型和拱星环境的影响,我们了解超新星的祖先演化。使用模型的核心塌陷超新星喷出物的化学成分,我们模拟的动力学和热X射线发射的冲击喷出物和拱星材料,建模为$r^{-2}$风,年龄为3000年。我们将这些模型的X射线光谱与朱雀卫星的观测结果进行了比较。我们还模拟了Ia型祖先模型的动力学和X射线发射。我们发现,在铁-钾线的能量质心之间的核心崩溃和Ia型模型有明显的区别。核心坍缩超新星模型预测更高的Fe-K线质心能量比Ia型模型,与观测一致。我们认为,更高的线质心的结果,发现在拱星环境中的缓慢移动的风从大规模的祖先的扩张所造成的密度增加。

英文摘要:

The recent discovery that the Fe-K line luminosities and energy centroids observed in nearby SNRs are a strong discriminant of both progenitor type and circumstellar environment has implications for our understanding of supernova progenitor evolution. Using models for the chemical composition of core-collapse supernova ejecta, we model the dynamics and thermal X-ray emission from shocked ejecta and circumstellar material, modeled as an $r^{-2}$ wind, to ages of 3000 years. We compare the X-ray spectra expected from these models to observations made with the Suzaku satellite. We also model the dynamics and X-ray emission from Type Ia progenitor models. We find a clear distinction in Fe-K line energy centroid between core-collapse and Type Ia models. The core-collapse supernova models predict higher Fe-K line centroid energies than the Type Ia models, in agreement with observations. We argue that the higher line centroids are a consequence of the increased densities found in the circumstellar environment created by the expansion of the slow-moving wind from the massive progenitors.

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