论文标题
1a型超新星的发展绝对幅度及其对宇宙学参数的关键影响
The evolving absolute magnitude of type 1a supernovae and its critical impact on the cosmological parameters
论文作者
论文摘要
在这项工作中，已经开发了一个计算机优化模型，该模型允许将超新星1a的初始观察数据加载到表中，简单地通过搜索观测和理论之间的最佳拟合，获得宇宙学模型参数的值。自然，初始数据是红移z，并且在超新星的最大亮度处明显的幅度m。为了在理论和观察之间更好地拟合，使用了Pearson的Chi2（卡方）拟合优度检验。对于LCDM模型，获得了结果，并且为了比较具有零宇宙常数的模型。为了改善观察到的数据和理论之间的拟合度，假设超新星的绝对幅度不是恒定的，而是随着时间的流逝而发展的，则进行了优化。假定绝对幅度对红移的依赖性是线性的：m = m（z = 0）+ez，其中e是1a型超新星的绝对幅度的演化系数。
In this work, a computer optimization model has been developed that allows one to load the initial observation data of supernovae 1a into a table and, simply, by searching for the best fit between observations and theory, obtain the values of the parameters of cosmological models. Naturally, the initial data are redshifts z and apparent magnitudes m at the maximum brightness of supernovae. For better fit between theory and observation, Pearson's Chi2 (Chi-squared) goodness-of-fit test was used. The results are obtained for the LCDM model and, for comparison, the model with a zero cosmological constant. In order to improve the fit between observed data and theory, the optimization is carried out assuming that the absolute magnitude of supernovae is not constant, but evolves with time. It is assumed that the dependence of the absolute magnitude on the redshift is linear: M=M(z=0)+ez, where e is the evolution coefficient of the absolute magnitude of type 1a supernovae.
