论文标题
对赤道平面的双极芯塌陷超新星的光曲线建模
Modelling light curves of bipolar core collapse supernovae from the equatorial plane
论文作者
论文摘要
我们使用核心崩溃超新星（CCSN）弹出的两元件双极玩具模型，以适应IIB型CCSN SN SN 2018GK（ASASSN-18AM）轻曲线中最大发光度的快速下降。在此玩具模型中，我们使用了类似于SN 2018GK的不同CCSN的模板光曲线，但它的光曲线并没有快速下降。与类似的球形爆炸相对于类似的球形爆炸，我们用极地喷射和赤道射出的两极形态增加了最大的发光度，并导致赤道观察者的急剧下降。 SN 2018GK玩具模型的总能量和质量为E = 5E51 ERG，M = 2.7MO。这种爆炸能量比中微子驱动的爆炸机制所能提供的更多，这意味着喷气机爆炸了SN 2018GK。正如我们的玩具模型所需的那样，这些能量的喷气机可能会使弹射体变成双极形态。我们粗略地估计，所有CCSNE的F = 2-5％都表明了这种行为，大多数是氢缺乏（剥离的Envelope）CCSNE，因为我们从赤道平面观察到它们。我们估计具有明显的双相形态的CCSNE的总比例为所有CCSNE的5-15％。
We use the two-components bipolar toy model of core collapse supernova (CCSN) ejecta to fit the rapid decline from maximum luminosity in the light curve of the type IIb CCSN SN 2018gk (ASASSN-18am). In this toy model we use a template light curve from a different CCSN that is similar to SN 2018gk, but that has no rapid drop in its light curve. The bipolar morphology that we model with a polar ejecta and an equatorial ejecta increases the maximum luminosity and causes a steeper decline for an equatorial observer, relative to a similar spherical explosion. The total energy and mass of our toy model for SN 2018gk are E=5e51 erg and M=2.7Mo. This explosion energy is more than what a neutrino-driven explosion mechanism can supply, implying that jets exploded SN 2018gk. These energetic jets likely shaped the ejecta to a bipolar morphology, as our toy model requires. We crudely estimate that f=2-5% of all CCSNe show this behavior, most being hydrogen deficient (stripped-envelope) CCSNe, as we observe them from the equatorial plane. We estimate the overall fraction of CCSNe that have a pronounced bipolar morphology to be 5-15% of all CCSNe.
