Pre-supernova activity as a possible explanation of the peculiar properties of Type IIP supernova 2009kf
Pre-supernova activity as a possible explanation of the peculiar properties of Type IIP supernova 2009kf
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超新星前活动可能是 IIP 型超新星 2009kf 特殊性质的解释
DOI：
10.1093/mnras/staa2527
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发表时间：
2020
影响因子：
4.8
通讯作者：
Maeda Keiichi
中科院分区：
文献类型：
--
作者：
Ouchi Ryoma;Maeda Keiichi
SN 2009kf是泛星1号观测发现的一颗异常明亮的IIP超新星。平台期的V波段星等为MV=−18.4mag，比典型的SNE IIP要亮得多。我们认为，如果我们假设在SN爆炸之前的演化的最后几年中，有超爱丁顿能量注入到包络中，那么它的不寻常性质可以很自然地解释。用这种前SN能量注入的前驱模型，我们可以对SN2009kf的观测数据进行拟合，得到合理的爆炸能量Eexp=2.8x×1051erg，56Ni质量为0.25nM⊙。具体地说，我们在核坍塌前的最后3.0年演化中，以3.0G×1039erg S−1的恒定速率将能量注入到包层中。我们认为，一些异常明亮的SNE IIP可能是前SN能量注入包层的结果。
SN 2009kf is an exceptionally bright Type IIP supernova (SN IIP) discovered by the Pan-STARRS 1 survey. TheV-band magnitude in the plateau phase isMV= −18.4 mag, which is much brighter than that for typical SNe IIP. We propose that its unusual properties can be naturally explained if we assume that there was a super-Eddington energy injection into the envelope in the last few years of the evolution before the SN explosion. Using a progenitor model with such a pre-SN energy injection, we can fit the observational data of SN 2009kf with a reasonable explosion energy ofEexp= 2.8 × 1051erg and56Ni mass of 0.25 M⊙. Specifically, we injected the energy into the envelope at a constant rate of 3.0 × 1039erg s−1in the last 3.0 yr of evolution before the core collapse. We propose that some unusually bright SNe IIP might result from pre-SN energy injection into the envelope.