Intermediate luminosity type Iax supernova 2019muj with narrow absorption lines: Long-lasting radiation associated with a possible bound remnant predicted by the weak deflagration model
Intermediate luminosity type Iax supernova 2019muj with narrow absorption lines: Long-lasting radiation associated with a possible bound remnant predicted by the weak deflagration model
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DOI：
10.1093/pasj/psab075
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发表时间：
2021-07
期刊：
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通讯作者：
M. Kawabata;K. Maeda;M. Yamanaka;T. Nakaoka;K. Kawabata;K. Aoki;G. Anupama;U. Burgaz;Anirban Dutta;K. Isogai;M. Kino;N. Kojiguchi;Iida Kota;B. Kumar;D. Kuroda;H. Maehara;K. Matsubayashi;K. Morihana;K. Murata;T. Ohshima;M. Otsuka;D. Sahu;Avinash Singh;K. Sugitani;J. Takahashi;K. Takagi
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作者：
M. Kawabata;K. Maeda;M. Yamanaka;T. Nakaoka;K. Kawabata;K. Aoki;G. Anupama;U. Burgaz;Anirban Dutta;K. Isogai;M. Kino;N. Kojiguchi;Iida Kota;B. Kumar;D. Kuroda;H. Maehara;K. Matsubayashi;K. Morihana;K. Murata;T. Ohshima;M. Otsuka;D. Sahu;Avinash Singh;K. Sugitani;J. Takahashi;K. Takagi
我们基于通过OISTER机会目标计划框架观测的多波段数据集，对中等光度的Iax超新星(SN Iax)2019muj进行了全面的光谱和光度分析。SN2019muj除了峰值光度外，在观测到的光谱特征和早期的光曲线演化特征上与亚发光的SNE Iax 2008ha和2010ae几乎相同。长期观测揭示了后期平坦的光曲线，如发光的SN Iax 2014dt所示。这可以用一个内部致密的光学厚度组件的存在来解释，该组件可能与爆炸后留下的绑定白矮星残留物有关。我们证明了具有大范围爆炸参数的弱爆燃模型可以再现其他SNE IAX的晚期光曲线。因此，我们得出结论，对于不同的子类SNE Iax，存在一个共同的爆炸机制。
We present comprehensive spectroscopic and photometric analyses of the intermediate luminosity Type Iax supernova (SN Iax) 2019muj based on multi-band datasets observed through the framework of the OISTER target-of-opportunity program. SN 2019muj exhibits almost identical characteristics with the subluminous SNe Iax 2008ha and 2010ae in terms of the observed spectral features and the light curve evolution at the early phase, except for the peak luminosity. The long-term observations unveil the flattening light curves at the late time as seen in a luminous SN Iax 2014dt. This can be explained by the existence of an inner dense and optically-thick component possibly associated with a bound white dwarf remnant left behind the explosion. We demonstrate that the weak deflagration model with a wide range of the explosion parameters can reproduce the latephase light curves of other SNe Iax. Therefore, we conclude that a common explosion mechanism operates for different subclass SNe Iax.