论文标题
我们可以使用配置熵来限制HI偏置的演变？
Can we constrain the evolution of HI bias using configuration entropy?
论文作者
论文摘要
我们研究了HI偏差的不同时间演变，研究后时代HI分布的配置熵的演变。我们使用简单的表格$ b（a）= b_ {0} a^{n} $带有不同的索引$ n $的简单表格$ b（a）= b_ {0} a^{n} $描述了HI分布线性偏置的时间演变。已知配置熵速率的衍生物在公正的$λ$ CDM模型中表现出对应于$λ$ - 摩擦平等的比例因子的峰值。我们表明，在具有时间相关线性偏置的$λ$ CDM模型中，峰值转移到$ n $的负值的较小比例因子。这与以下事实有关：在HI偏见的强烈时间演变的情况下，HI密度场中结构的生长甚至可以显着放慢。我们发现，这种转变与索引$ n $线性相关。我们获得了这两个参数之间的最佳拟合关系，并提出从观测值中识别该峰的位置将使我们能够约束$λ$ CDM模型框架内HI偏置的时间演变。
We study the evolution of the configuration entropy of HI distribution in the post-reionization era assuming different time evolution of HI bias. We describe time evolution of linear bias of HI distribution using a simple form $b(a)=b_{0} a^{n}$ with different index $n$. The derivative of the configuration entropy rate is known to exhibit a peak at the scale factor corresponding to the $Λ$-matter equality in the unbiased $Λ$CDM model. We show that in the $Λ$CDM model with time-dependent linear bias, the peak shifts to smaller scale factors for negative values of $n$. This is related to the fact that the growth of structures in the HI density field can significantly slow down even before the onset of $Λ$ domination in presence of a strong time evolution of the HI bias. We find that the shift is linearly related to the index $n$. We obtain the best fit relation between these two parameters and propose that identifying the location of this peak from observations would allow us to constrain the time evolution of HI bias within the framework of the $Λ$CDM model.
