标题： Ia型超新星率与恒星形成历史 显示英文标题

标题： The rate of type Ia Supernovae and the star formation history

摘要： Ia型超新星（SNIa）爆发率与宿主星系颜色的标定提供了关于SNIa前身星延迟时间分布（DTD）的信息。 我们表明，这些信息似乎依赖于用于追踪宿主星系恒星年龄分布和质量-光度比的光电波段。 使用(U-V)和(B-K)颜色来限制恒星形成历史，我们将SNIa爆发率建模为不同DTD下形态学星系类型的函数。 与单位B波段和K波段光度观测值的比较得出一致的结果，尽管较大的误差条让我们只能排除非常平坦且非常狭窄的DTD。 一个恒星生成的SNIa数量约为每形成1000个太阳质量的恒星就会发生约2到3次爆发。 显示英文摘要

摘要： The scaling of the rate of type Ia Supernovae (SNIa) with the parent galaxies' color provides information on the distribution of the delay times (DTD) of the SNIa progenitors. We show that this information appears to depend on the photometric bands used to trace the stellar age distribution and mass-to-light ratio in the parent galaxies. Using both (U-V) and (B-K) colors to constrain the star formation history, we model the SNIa rate as a function of morphological galaxy type for different DTDs. The comparison with the observed rate per unit B and K band luminosity yields consistent results, although the large error bars allow us to exclude only very flat and very narrow DTDs. The number of SNIa from one stellar generation results of ~ 2, 3 events every 1000 Mo of stars formed.