论文标题
体素强度分布与线强度映射功率谱之间的分析协方差
Analytical covariance between voxel intensity distributions and line-intensity mapping power spectra
论文作者
论文摘要
功率谱和体素强度分布（VID）是研究线强度图的两个主要摘要统计数据。我们根据局部过度重新制定了VID的推导，并首次得出了VID与线强度映射功率谱之间的分析协方差。我们研究了这种协方差在不同的实验设置中的特征，并表明我们可以恢复与基于模拟的协方差相似的结果。借助这种形式主义，我们还计算了宇宙差异贡献vid不确定性，我们发现，对于泊松采样的标准差异，我们发现这是依从性的。我们的结果允许对VID和线强度映射功率谱进行一般关节分析。
The power spectrum and the voxel intensity distribution (VID) are two of the main proposed summary statistics to study line-intensity maps. We reformulate the derivation of the VID in terms of the local overdensities and derive for the first time an analytic covariance between the VID and the line-intensity mapping power spectrum. We study the features of this covariance for different experimental setups and show that we can recover similar results to simulation-based covariances. With this formalism, we also compute the cosmic variance contribution the VID uncertainty, which we find to be subdominant with respect to the standard variance from Poisson sampling. Our results allow for general joint analyses of the VID and the line-intensity mapping power spectrum.
