SN II光变曲线
The Flavours of SN II Light Curves
摘要：
我们目前的R-波段光变曲线的II型超新星（SNe）从加州理工学院核心崩溃计划（CCCP）。除了相互作用（IIn型）SNe和具有长上升时间的罕见事件之外，我们发现大多数光曲线形状属于三种不同类型之一：平台期、缓慢下降和快速下降事件。后一类仅由IIb型SNe组成，其呈现与SNe Ib相似的光变曲线形状，这可能表明类似的祖细胞通道。我们没有发现任何中间的光变曲线，这意味着这些子类不太可能反映连续参数的变化，而是可能导致物理上不同的祖先系统，加强建议的二元起源至少有一些剥离SNe。我们发现SNe IIP有一个很大的平台光度范围，而平台长度在大约100天时似乎相当均匀。我们还提出了宿主星系的帕洛玛瞬变工厂（PTF）核心崩溃SN样本的趋势，这增加了一些测光结果。
英文摘要：
We present R-Band light curves of Type II supernovae (SNe) from the Caltech Core Collapse Program (CCCP). With the exception of interacting (Type IIn) SNe and rare events with long rise times, we find that most light curve shapes belong to one of three distinct classes: plateau, slowly declining and rapidly declining events. The latter class is composed solely of Type IIb SNe which present similar light curve shapes to those of SNe Ib, suggesting, perhaps, similar progenitor channels. We do not find any intermediate light curves, implying that these subclasses are unlikely to reflect variance of continuous parameters, but rather might result from physically distinct progenitor systems, strengthening the suggestion of a binary origin for at least some stripped SNe. We find a large plateau luminosity range for SNe IIP, while the plateau lengths seem rather uniform at approximately 100 days. We present also host galaxy trends from the Palomar Transient Factory (PTF) core collapse SN sample, which augment some of the photometric results.
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