Constraints on the Explosion Timescale of Core-collapse Supernovae Based on Systematic Analysis of Light Curves
Constraints on the Explosion Timescale of Core-collapse Supernovae Based on Systematic Analysis of Light Curves
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DOI：
10.3847/1538-4357/ac6bec
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Sei Saito;Masaomi Tanaka;R. Sawada;T. Moriya
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文献类型：
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作者：
Sei Saito;Masaomi Tanaka;R. Sawada;T. Moriya
核心坍缩超新星的爆炸机制目前还不完全清楚。本文给出了基于超新星爆炸合成的56Ni的爆炸时间尺度的约束。首先，我们系统地分析了82颗剥离包膜超新星（SESNe）的多波段光曲线，获得了最大样本的剥离包膜超新星（SESNe）的多波段光谱能量分布热光度曲线。我们测量了光曲线的衰减时间尺度和峰值亮度，并估计了抛射质量（M ej）和56Ni质量（M Ni），以将观测到的性质与爆炸物理联系起来。然后，我们进行一维流体力学和核合成计算，改变祖质量和爆炸时间尺度。计算结果表明，以56Ni为动力的SNe能达到的最大56Ni质量为M Ni > 0.2 M ej。将观测结果与计算结果进行比较，我们发现爆炸时间尺度小于0.3 s可以解释大部分SESNe合成的56Ni质量。
The explosion mechanism of core-collapse supernovae is not fully understood yet. In this work, we give constraints on the explosion timescale based on 56Ni synthesized by supernova explosions. First, we systematically analyze multiband light curves of 82 stripped-envelope supernovae (SESNe) to obtain bolometric light curves, which is among the largest samples of the bolometric light curves of SESNe derived from the multiband spectral energy distribution. We measure the decline timescale and the peak luminosity of the light curves and estimate the ejecta mass (M ej) and 56Ni mass (M Ni) to connect the observed properties with the explosion physics. We then carry out one-dimensional hydrodynamics and nucleosynthesis calculations, varying the progenitor mass and the explosion timescale. From the calculations, we show that the maximum 56Ni mass that 56Ni-powered SNe can reach is expressed as M Ni ≲ 0.2 M ej. Comparing the results from the observations and the calculations, we show that the explosion timescale shorter than 0.3 s explains the synthesized 56Ni mass of the majority of the SESNe.