论文标题
CMAGIC图的凸起形态
Bump Morphology of the CMAGIC Diagram
论文作者
论文摘要
我们将颜色障碍拦截校准方法（CMAGIC）应用于附近的Supernova工厂SNE IA分光光度计数据集。当前现有的CMAGIC参数是拟合颜色磁性图中第一个线性区域的直线的斜率和截距，该线在最大亮度后大约30天内发生。我们定义了一个新参数，$ω_{xy} $，``bump''的大小在任意过滤器的最大亮度$ x $和$ y $的最大亮度附近。我们在第一个线性区域的斜率（$β_{xy，1} $）与$ω__{xy} $之间发现了显着的相关性。这些结果可以用于我们的优势，因为它们受到灭绝的影响要比定义为时间的函数的参数所影响。此外，$ω_{xy} $是独立于模板计算的。我们发现，当前的经验模板成功地重现了这项工作中描述的特征，尤其是salt3，该特征正确地表现出我们数据中看到的斜率和颠簸大小之间的负相关性。在1-D模拟中，我们表明，由于大规模的雷利 - 泰勒不稳定性，可以理解凸起特征和$β_{xy，1} $之间的相关性。
We apply the color-magnitude intercept calibration method (CMAGIC) to the Nearby Supernova Factory SNe Ia spectrophotometric dataset. The currently existing CMAGIC parameters are the slope and intercept of a straight line fit to the first linear region in the color-magnitude diagram, which occurs over a span of approximately 30 days after maximum brightness. We define a new parameter, $ω_{XY}$, the size of the ``bump'' feature near maximum brightness for arbitrary filters $X$ and $Y$. We find a significant correlation between the slope of the first linear region, $β_{XY, 1}$, in the CMAGIC diagram and $ω_{XY}$. These results may be used to our advantage, as they are less affected by extinction than parameters defined as a function of time. Additionally, $ω_{XY}$ is computed independently of templates. We find that current empirical templates are successful at reproducing the features described in this work, particularly SALT3, which correctly exhibits the negative correlation between slope and bump size seen in our data. In 1-D simulations, we show that the correlation between the size of the bump feature and $β_{XY, 1}$ can be understood as a result of chemical mixing due to large-scale Rayleigh-Taylor instabilities.
