论文标题
IIB Supernova型的光谱和光谱观测以及流体力学建模2017GPN
Optical and spectral observations and hydrodynamic modelling of Type IIb Supernova 2017gpn
论文作者
论文摘要
在这项工作中，我们介绍了IIB Supernova型2017GPN的光度和光谱观测。该超新星是在Ligo/处女座G299232引力波事件的错误盒中发现的。我们在B和R PASS带中获得了光曲线，并使用一维辐射液位Stella对其进行了数字建模。最佳拟合模型具有以下参数：前SN星质量和半径分别为3.5 msun和50 rsun；爆炸能量为eexp = 1.2 * 10^51 erg;放射性镍的质量为m56ni = 0.11 msun，它完全通过喷射（氢包膜0.06 msun的质量）混合。此外，SN 2017GPN是确认的SN IIB，位于其主机Galaxy NGC 1343的中心最远的距离（即投影距离约为21 kpc）。这挑战了大型恒星IIB型超新星型起源的情况。
In this work we present the photometric and spectroscopic observations of Type IIb Supernova 2017gpn. This supernova was discovered in the error-box of LIGO/Virgo G299232 gravitational-wave event. We obtained the light curves in B and R passbands and modelled them numerically using the one-dimensional radiation hydrocode STELLA. The best-fit model has the following parameters: the pre-SN star mass and the radius are 3.5 Msun and 50 Rsun, respectively; the explosion energy is Eexp = 1.2 * 10^51 erg; the mass of radioactive nickel is M56Ni =0.11 Msun, which is totally mixed through the ejecta, the mass of the hydrogen envelope 0.06 Msun. Moreover, SN 2017gpn is a confirmed SN IIb that is located at the farthest distance from the center of its host galaxy NGC 1343 (i.e. the projected distance is about 21 kpc). This challenges the scenario of the origin of Type IIb Supernovae from massive stars.
