The Value of Progenitor Radius Measurements for Explosion Modeling of Type II-Plateau Supernovae
The Value of Progenitor Radius Measurements for Explosion Modeling of Type II-Plateau Supernovae
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DOI：
10.3847/2041-8213/ab9300
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
Jared A. Goldberg;L. Bildsten
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文献类型：
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作者：
Jared A. Goldberg;L. Bildsten
利用恒星天体物理实验模块(MESA)+STELLA，我们证明了非常不同的物理模型可以充分再现特定观测到的ii型高原超新星（SN）。我们考虑SN2004A， SN2004et, SN2009ib， SN2017eaw和SN2017gmr，这些富镍（）事件具有热光度曲线和高原上的良好采样下降。这些事件也对祖先半径有限制，通过祖先图像，或者，在SN2017gmr的情况下，来自拟合冲击冷却模型的半径。一般来说，许多跨越前驱参数空间的爆炸可以产生良好的光曲线和fe线速度一致性，这表明在给定半径下匹配平台特性的激励模型中标度定律是成功的，并突出了模型中平台亮度和速度与观测事件之间的简并性，该简并性在抛射物质量、半径和爆炸能量上可以跨越50%以上。这有助于解释使用不同模型计算的同一事件所报告的爆炸特性的差异。我们的计算结果与爆炸前的祖星半径测量相结合，或者对爆炸后几天SN观测中量化祖星半径的最外层物质的强大理解，得出了爆炸特性。
Using Modules for Experiments in Stellar Astrophysics (MESA)+STELLA, we show that very different physical models can adequately reproduce a specific observed Type II-Plateau supernova (SN). We consider SN2004A, SN2004et, SN2009ib, SN2017eaw, and SN2017gmr, nickel-rich ( ) events with bolometric lightcurves and a well-sampled decline from the plateau. These events also have constraints on the progenitor radius, via a progenitor image, or, in the case of SN2017gmr, a radius from fitting shock-cooling models. In general, many explosions spanning the parameter space of progenitors can yield excellent lightcurve and Fe-line velocity agreement, demonstrating the success of scaling laws in motivating models that match plateau properties for a given radius and highlighting the degeneracy between plateau luminosity and velocity in models and observed events, which can span over 50% in ejecta mass, radius, and explosion energy. This can help explain disagreements in explosion properties reported for the same event using different model calculations. Our calculations yield explosion properties when combined with pre-explosion progenitor radius measurements or a robust understanding of the outermost of material that quantifies the progenitor radius from SN observations a few days after explosion.