论文标题
IA型超新星中幸存的氦星伴侣的签名以及SN 2011FE的祖细胞伴侣的约束
Signatures of a surviving helium-star companion in Type Ia supernovae and constraints on the progenitor companion of SN 2011fe
论文作者
论文摘要
已经提出，已提议由白矮人和非脱位氦（HE） - 标准伴侣组成的单脱位（SD）二进制系统作为IA型超新星（SNE IA）的潜在祖细胞。预计HE-Star的同伴将在此SD祖细胞模型中生存SN IA爆炸。在目前的工作中，我们将尚存的HE-Star伴侣模型绘制为从以前的三维流体动力学模拟中进行的，将射流式相互作用的相互作用到一维恒星进化代码MESA中，以遵循其长期进化，以对其长期的进化进行预测，以预测其后影响的观察性能，这可以有助于搜索这种幸存的He-Star Companive invure Comperive nvure Comperive invure Vuture Vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture vuture。通过与最佳观察到的SN IA 2011FE的非常晚期的光曲线进行比较，我们发现幸存的He-Star伴侣在最大光之后大约1000D比SN 2011FE的发光明显更高。这表明，He Star非常不可能成为SN 2011FE的祖先的伴侣。
Single-degenerate (SD) binary systems composed of a white dwarf and a non-degenerate helium (He)-star companion have been proposed as the potential progenitors of Type Ia supernovae (SNe Ia). The He-star companions are expected to survive the SN Ia explosion in this SD progenitor model. In the present work, we map the surviving He-star companion models computed from our previous three-dimensional hydrodynamical simulations of ejecta-companion interaction into the one-dimensional stellar evolution code MESA to follow their long-term evolution to make predictions on their post-impact observational properties, which can be helpful for searches of such surviving He-star companions in future observations. By comparing with the very late-epoch light curve of the best observed SN Ia, SN 2011fe, we find that our surviving He-star companions become significantly more luminous than SN 2011fe about 1000d after the maximum light. This suggests that a He star is very unlikely to be a companion to the progenitor of SN 2011fe.
