Exploring the Efficacy and Limitations of Shock-cooling Models: New Analysis of Type II Supernovae Observed by the Kepler Mission
Exploring the Efficacy and Limitations of Shock-cooling Models: New Analysis of Type II Supernovae Observed by the Kepler Mission
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DOI：
10.3847/1538-4357/aa8465
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
A. Rubin;A. Gal-yam
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文献类型：
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作者：
A. Rubin;A. Gal-yam
现代的瞬变测量已经开始发现和跟踪超新星（SNe），这是在第一束光之后不久，提供了对II型SNe上升的系统测量。我们探讨如何分析模型的早期冲击冷却排放核心崩溃SNe可以约束祖的半径，爆炸速度，和本地主机灭绝。我们在几个现实的观测场景中模拟合成测光;假设模型很好地描述了典型的爆炸，我们发现紫外观测可以将祖星的半径限制在±10%-15%的统计不确定性，系统不确定性为± 20%。利用这些观测结果，可以将局部宿主消光（AV）限制为2倍，将激波速度限制为±5%，系统不确定度为± 10%。我们还重新分析了Garnavich等人（2016）提出的SN光变曲线，发现KSN 2011 a可以用祖星半径为的蓝超巨星模型拟合，而KSN 2011 d可以用祖星半径为的红超巨星模型拟合。我们的研究结果与Garnavich等人的结果不一致。此外，我们重新评估了他们的说法，发现在KSN 2011 d的光变曲线中没有统计学上显著的证据表明存在冲击爆发耀斑。
Modern transient surveys have begun discovering and following supernovae (SNe) shortly after first light—providing systematic measurements of the rise of Type II SNe. We explore how analytic models of early shock-cooling emission from core-collapse SNe can constrain the progenitor’s radius, explosion velocity, and local host extinction. We simulate synthetic photometry in several realistic observing scenarios; assuming the models describe the typical explosions well, we find that ultraviolet observations can constrain the progenitor’s radius to a statistical uncertainty of ±10%–15%, with a systematic uncertainty of ±20%. With these observations the local host extinction (AV) can be constrained to a factor of two and the shock velocity to ±5% with a systematic uncertainty of ±10%. We also reanalyze the SN light curves presented by Garnavich et al. (2016) and find that KSN 2011a can be fit by a blue supergiant model with a progenitor radius of , while KSN 2011d can be fit with a red supergiant model with a progenitor radius of . Our results do not agree with those of Garnavich et al. Moreover, we re-evaluate their claims and find that there is no statistically significant evidence for a shock-breakout flare in the light curve of KSN 2011d.