论文标题
白矮人的暴力合并能否解释IA Supernova SN 2011aa型最慢的衰落？
Can the violent merger of white dwarfs explain the slowest declining Type Ia supernova SN 2011aa?
论文作者
论文摘要
我们提出了IA Supernova型SN 2011AA的光学观测和蒙特卡洛辐射转移模型。 $Δm_{15}（b）$ 0.59 \ pm 0.07 $ mag和a峰值$ m _ {\ rm b} $ $ -19.30 \ pm 0.27 $ 0.27 $ 0.27 $ mag，SN 2011aa的下降速度最慢。 $ i $ band中的次要最大值是不存在或同样明亮的主要最大值。 C II的速度低于Si II的速度。这表明在较低的速度下存在C比SI或视线效应。将Arnett的辐射扩散模型应用于降压光曲线，表明一个巨大的弹出$ m _ {\ rm {ej}} 〜1.8-2.6〜m _ {\ odot} $。较慢的下降速率和峰值峰值的较大弹出质量通过双重堕落，暴力合并爆炸模型很好地解释了。考虑到剧烈的合并密度曲线，塞多纳（Sedona）产生的合成光谱和光曲线与观测值相匹配。
We present optical observations and Monte Carlo radiative transfer modeling of the Type Ia supernova SN 2011aa. With a $Δm_{15} (B)$ of $0.59 \pm 0.07$ mag and a peak magnitude $M_{\rm B}$ of $-19.30 \pm 0.27$ mag, SN 2011aa has the slowest decline rate among SNe Ia. The secondary maximum in the $I$-band is absent or equally bright as the primary maximum. The velocity of C II is lower than the velocity of Si II. This indicates either presence of C at lower velocities than Si or a line of sight effect. Application of Arnett's radiation diffusion model to the bolometric light curve indicates a massive ejecta $M_{\rm{ej}} ~ 1.8 - 2.6~M_{\odot}$. The slow decline rate and large ejecta mass, with a normal peak magnitude, are well explained by double degenerate, violent merger explosion model. The synthetic spectra and light curves generated with SEDONA considering a violent merger density profile match the observations.
