论文标题
IA SN 2010LP中特殊的中央氧气质量非常低：SNE IA的低亮度端的进一步多样性
A very low central oxygen mass in the peculiar type Ia SN 2010lp: further diversity at the low-luminosity end of SNe Ia
论文作者
论文摘要
为了估计内部喷射的组成并阐明该事件的性质，对特殊的低亮度IA Supernova 2010LP的螺旋光谱进行了建模。尽管光曲线正常下降，但SN 2010LP在谱图上与SN 1991BG的早期相似。但是，它显示出非常不寻常的双峰[oi] $λλ\，6300,6363 $在晚期发射（Taubenberger等人，2013年）。 Nebular Spectrum的建模表明，非常少量的氧（$ \ sim0.05 $ m $ _ {\ odot} $），以非常低的速度（$ \ sim2000 $ km/s）扩展足以再现观察到的发射。星云的其余部分与SN 1991bg并不太相同，只是SN 2010LP稍微发光。双峰[OI]发射表明SN 2010LP可能与两个低质量白矮人的合并或碰撞一致。 SN IA亮度序列的低端被不同的事件明确填充，其中不同的通道可能会造成任何贡献。
A nebular spectrum of the peculiar, low-luminosity type Ia supernova 2010lp is modelled in order to estimate the composition of the inner ejecta and to illuminate the nature of this event. Despite having a normally declining light curve, SN 2010lp was similar spectroscopically to SN 1991bg at early times. However, it showed a very unusual double-peaked [OI] $λλ\,6300,6363$ emission at late times (Taubenberger et al. 2013). Modelling of the nebular spectrum suggests that a very small amount of oxygen ($\sim0.05$ M$_{\odot}$), expanding at very low speed ($\sim2000$ km/s) is sufficient to reproduce the observed emission. The rest of the nebula is not too dissimilar from SN 1991bg, except that SN 2010lp is slightly more luminous. The double-peaked [OI] emission suggests that SN 2010lp may be consistent with the merger or collision of two low-mass white dwarfs. The low end of the SN Ia luminosity sequence is clearly populated by diverse events, where different channels may contribute.
