论文标题
通过结合多次未来调查来限制增长率
Constraining the growth rate by combining multiple future surveys
论文作者
论文摘要
大规模结构的增长率提供了对标准宇宙学模型的强大一致性测试，并探究了可能与一般相对性偏差的探测。我们使用Fisher分析来预测下一代光谱调查组合的生长速率的约束。在重叠的调查量中，我们使用多迹线分析来显着降低宇宙差异的效果。为了利用整个卷，非重叠的个体调查量包含在Fisher分析中。我们使用观察到的角功率谱，该角度频谱自然包含所有广角和镜头效应，并规避了对阿尔科克 - 帕奇尼斯基校正的需求。通过使用一种新技术来避免计算亚基贡献，包括红移箱之间的跨相关性。在标准宇宙学参数以及每个红移箱中的聚类偏差上进行边缘化，我们发现$γ$上的精度可提高最佳的单个跟踪精度，最多可提高$ \ sim $ 50 \％。
The growth rate of large-scale structure provides a powerful consistency test of the standard cosmological model and a probe of possible deviations from general relativity. We use a Fisher analysis to forecast constraints on the growth rate from a combination of next-generation spectroscopic surveys. In the overlap survey volumes, we use a multi-tracer analysis to significantly reduce the effect of cosmic variance. The non-overlap individual survey volumes are included in the Fisher analysis in order to utilise the entire volume. We use the observed angular power spectrum, which naturally includes all wide-angle and lensing effects and circumvents the need for an Alcock-Paczynski correction. Cross correlations between redshift bins are included by using a novel technique to avoid computation of the sub-dominant contributions. Marginalising over the standard cosmological parameters, as well as the clustering bias in each redshift bin, we find that the precision on $γ$ improves on the best single-tracer precision by up to $\sim$50\%.
