论文标题
通过红移调查Amati参数的演变
Investigating the Evolution of Amati Parameters with Redshift
论文作者
论文摘要
伽马射线爆发（GRB）是宇宙中最亮的物体之一，因此可以观察到非常高的红移。 GRB的强度和光谱相关性之间正确校准的经验相关性可用于估计宇宙参数。但是，与红移一起演变的GRBS的可能性是一个长期的难题。在这项工作中，我们使用了162个长期GRB来确定某个红移以下和更高的GRB是否具有不同的特性。 GRB分为两组，我们分别符合每组的AMATI关系。我们的发现表明，两组的AMATI参数的估计基本上不同。我们执行模拟来研究选择效果是否可能导致差异。我们的分析表明，差异可能是固有的，选择效应不是它们的真实起源。
Gamma Ray Bursts (GRB) are among the brightest objects in the Universe and hence can be observed up to a very high redshift. Properly calibrated empirical correlations between intensity and spectral correlations of GRBs can be used to estimate the cosmological parameters. However, the possibility of the evolution of GRBs with the redshift is a long-standing puzzle. In this work, we used 162 long-duration GRBs to determine whether GRBs below and above a certain redshift have different properties. The GRBs are split into two groups, and we fit the Amati relation for each group separately. Our findings demonstrate that estimations of the Amati parameters for the two groups are substantially dissimilar. We perform simulations to investigate whether the selection effects could cause the difference. Our analysis shows that the differences may be intrinsic, and the selection effects are not their true origin.
