论文标题
使用Supernova 1992a的后期光曲线测试祖细胞模型
Testing Progenitor Models Using the Late-Time Light Curve of Supernova 1992A
论文作者
论文摘要
优势放射性能源动力IA类型IA Supernova Light Curves有望从$^{56} $ CO的衰减转换为非常晚的exochs $^{57} $ CO。我们使用爆炸后900多天获得的SN1992A的档案HST图像来限制其钴同位素丰度比率，并将其与研究良好的事件SN2011FE进行比较。我们确认$^{57} $ co / $^{56} $ co比率为$ 0.026 \ pm 0.004 $ $ a arxiv：1608.01155，与“双重脱位”祖细胞场景一致。对于SN1992A，我们发现$ 0.034 \ pm 0.010 $的比率，但是大不确定性不允许我们区分祖细胞模型
The dominant radioactive energy source powering Type Ia supernova light curves is expected to switch from the decay of $^{56}$Co to $^{57}$Co at very late epochs. We use archival HST images of SN1992A obtained more than 900 days after explosion to constrain its cobalt isotopic abundance ratio and compare it to the well-studied event SN2011fe. We confirm the $^{57}$Co / $^{56}$Co ratio for SN2011fe of $0.026\pm 0.004$ found by arXiv:1608.01155, consistent with a "double degenerate" progenitor scenario. For SN1992A, we find a ratio of $0.034\pm 0.010$, but the large uncertainty does not allow us to differentiate between progenitor models
