论文标题
（中级）Palomar瞬态工厂的IC超新星型
Type Ic supernovae from the (intermediate) Palomar Transient Factory
论文作者
论文摘要
IC型超新星代表了最剥离的大恒星的爆炸，但它们的祖细胞和爆炸机制仍不清楚。观察到的超新星的较大样品可以帮助表征这些瞬变的种群。我们提供了44个光谱型正常型IC超新星的分析，重点是光曲线。使用Palomar Transient工厂（PTF）及其延续，中级Palomar瞬态工厂（IPTF）获得了7年的光度数据。这是一个不受限制的调查中的第一个同质和大型SNE IC样本，我们旨在估计样品的爆炸参数。我们提出了这些SNE的K校正后的Bgriz光曲线，该曲线是通过在模板提取图像上的光度法获得的。我们对$ r $ band灯曲线的形状进行了分析，并确认了RISE参数Delta M _ { - 10}与下降参数Delta M_ {15}之间的相关性。峰r波段绝对幅度的平均为-17.71 +-0.85 mag。为了推导爆炸时期，我们将R波段的灯曲面拟合到源自采样良好采样的光曲线的模板上。我们使用R和G频段数据，G-R颜色和降压测度校正计算了降压光曲线。峰值光曲线和Fe II lambda 5169峰值的速度用于适合Arnett半分析模型，以估算每个SN的射流质量M_ {EJ}，爆炸能E_ {K {K k}和每个SN的放射性镍（M（56）Ni）。包括41 sne，我们发现<m_ {ej}> = 4.50 +-0.79 msun，<e_ {k}> = 1.79 +-0.29 x10^{51} erg和<m（56）ni）> = 0.19 +-0.03 msun。爆炸参数的分布与文献中可用的分布相当，但是我们的大样本还包括一些瞬态，具有狭窄且非常宽的光曲线，导致更极端的弹出质量值。
Type Ic supernovae represent the explosions of the most stripped massive stars, but their progenitors and explosion mechanisms remain unclear. Larger samples of observed supernovae can help characterize the population of these transients. We present an analysis of 44 spectroscopically normal Type Ic supernovae, with focus on the light curves. The photometric data were obtained over 7 years with the Palomar Transient Factory (PTF) and its continuation, the intermediate Palomar Transient Factory (iPTF). This is the first homogeneous and large sample of SNe Ic from an untargeted survey, and we aim to estimate explosion parameters for the sample. We present K-corrected Bgriz light curves of these SNe, obtained through photometry on template-subtracted images. We performed an analysis on the shape of the $r$-band light curves and confirmed the correlation between the rise parameter Delta m_{-10} and the decline parameter Delta m_{15}. Peak r-band absolute magnitudes have an average of -17.71 +- 0.85 mag. To derive the explosion epochs, we fit the r-band lightcurves to a template derived from a well-sampled light curve. We computed the bolometric light curves using r and g band data, g-r colors and bolometric corrections. Bolometric light curves and Fe II lambda 5169 velocities at peak were used to fit to the Arnett semianalytic model in order to estimate the ejecta mass M_{ej}, the explosion energy E_{K} and the mass of radioactive nickel (M(56) Ni) for each SN. Including 41 SNe, we find average values of <M_{ej}>=4.50 +-0.79 msun, <E_{K}>=1.79 +- 0.29 x10^{51} erg, and <M(56)Ni)>= 0.19 +- 0.03 msun. The explosion-parameter distributions are comparable to those available in the literature, but our large sample also includes some transients with narrow and very broad light curves leading to more extreme ejecta masses values.
