论文标题
芯塌陷超新星的喷射形几何修饰的光曲线
Jet-shaped geometrically modified light curves of core collapse supernovae
论文作者
论文摘要
我们建立了三个简单的双极射流模型，用于核心塌陷超新星（CCSNE），就像爆炸由强射流驱动时所预期的那样，并表明，对于位于弹出器的赤道平面中的观察者，光曲线的亮度迅速下降，甚至突然下降。在计算几何修饰的光球时，我们假设射流具有由赤道喷射组成和更快的极性喷射组成的轴对称结构，并且具有均匀的有效温度。在早期，极性喷射中的光球增长的速度比赤道的速度快，导致相对于球形爆炸的发光度更高。额外辐射能量的起源是喷气机。在以后的时间，光学深度在极地喷射中的降低速度更快，并且极性光球被隐藏在赤道喷射后面，以供赤道平面的观察者，导致快速发光度下降。对于喷气机充气两个低密度极性气泡的模型，发光度下降可能会突然。该模型使我们能够适应SN 2018don光曲线的突然下降。
We build three simple bipolar ejecta models for core collapse supernovae (CCSNe), as expected when the explosion is driven by strong jets, and show that for an observer located in the equatorial plane of the ejecta, the light curve has a rapid luminosity decline, and even an abrupt drop. In calculating the geometrically modified photosphere we assume that the ejecta has an axisymmetrical structure composed of an equatorial ejecta and faster polar ejecta, and has a uniform effective temperature. At early times the photosphere in the polar ejecta grows faster than the equatorial one, leading to higher luminosity relative to a spherical explosion. The origin of the extra radiated energy is the jets. At later times the optical depth decreases faster in the polar ejecta, and the polar photosphere becomes hidden behind the equatorial ejecta for an observer in the equatorial plane, leading to a rapid luminosity decline. For a model where the jets inflate two low-density polar bubbles, the luminosity decline might be abrupt. This model enables us to fit the abrupt decline in the light curve of SN 2018don.
