论文标题
明亮类型IAX超新星SN 2020REA的光学研究
Optical studies of a bright Type Iax supernova SN 2020rea
论文作者
论文摘要
我们介绍了位于IAX型超新星（SNE）较明亮的光度端的IAX超新星（SN）2020REA的光度和光谱分析。 SN〜2020REA的光曲线下降速率为$δ$ m $ _ {15} $（g）= 1.31 $ \ pm $ 0.08 mag，类似于2012z和2005hk。用辐射扩散模型对伪降压光曲线进行建模，产生的质量为$^{56} $ ni为0.13 $ \ pm $ 0.01 m $ _ {\ odot} $，eigna质量为0.77 $^{+0.11} SN〜2020REA在光谱阶段中的光谱特征与SN 2012Z表现出非常相似的相似之处。 SN〜2020REA早期光谱的TARDIS建模揭示了铁组元素（IGES）的优势。 SI {\ sc ii}线的光电速度对于Sn〜2020ReA的最大值为$ \ SIM $ \ sim $ 6500 km s $^{ - 1} $，比Fe {\ sc ii}线的测量速度少，并表示有效的混合。 SN〜2020REA的观察到的物理特性与Chandrasekhar质量C-O白矮人的纯deflagration模型的预测相匹配。 SN区域周围的主机星系的金属性为12+log（O/h）= 8.56 $ \ pm $ 0.18 DEX，与SN 2012z相似。
We present optical photometric and spectroscopic analysis of a Type Iax supernova (SN) 2020rea situated at the brighter luminosity end of Type Iax supernovae (SNe). The light curve decline rate of SN~2020rea is $Δ$m$_{15}$(g) = 1.31$\pm$0.08 mag which is similar to SNe 2012Z and 2005hk. Modelling the pseudo bolometric light curve with a radiation diffusion model yields a mass of $^{56}$Ni of 0.13$\pm$0.01 M$_{\odot}$ and an ejecta mass of 0.77$^{+0.11}_{-0.21}$ M$_{\odot}$. Spectral features of SN~2020rea during the photospheric phase show good resemblance with SN 2012Z. TARDIS modelling of the early spectra of SN~2020rea reveals a dominance of Iron Group Elements (IGEs). The photospheric velocity of the Si {\sc II} line around maximum for SN~2020rea is $\sim$ 6500 km s$^{-1}$ which is less than the measured velocity of the Fe {\sc II} line and indicates significant mixing. The observed physical properties of SN~2020rea match with the predictions of pure deflagration model of a Chandrasekhar mass C-O white dwarf. The metallicity of the host galaxy around the SN region is 12+log(O/H) = 8.56$\pm$0.18 dex which is similar to that of SN 2012Z.
