论文标题
TSZ簇计数和宇宙剪切的关节宇宙学和质量校准
Joint cosmology and mass calibration from tSZ cluster counts and cosmic shear
论文作者
论文摘要
我们提出了一种新的方法，用于从弱透镜测量和丰富的Thermal Sunyaev-Zel'Dovich（TSZ）选定的星系簇的结合结合使用联合宇宙学参数推理和群集质量校准。我们将群集计数与球形谐波宇宙剪切功率谱以及簇过度密度和宇宙剪切之间的互相关相结合。这些相关性限制了群集质量观察的关系。我们使用Halo模型框架（包括其完整的非高斯协方差）对观测值进行建模。对LSST宇宙剪切和Simons观测值TSZ群集的组合的宇宙学和质量校准参数的预测约束，我们发现集群宇宙学的竞争性约束，与单独使用LSST宇宙剪切的绩效相比，优点的暗能量图的两倍改善。我们发现大多数质量校准信息将位于群集过度密度和宇宙剪切之间的跨相关的较大和中间尺度中。最后，我们发现使用堆叠的群集镜头测量值基于校准质量的传统分析的限制与传统分析具有广泛的比较，从而始终如一地考虑了与宇宙剪切的相关性。
We present a new method for joint cosmological parameter inference and cluster mass calibration from a combination of weak lensing measurements and the abundance of thermal Sunyaev-Zel'dovich (tSZ) selected galaxy clusters. We combine cluster counts with the spherical harmonic cosmic shear power spectrum and the cross-correlation between cluster overdensity and cosmic shear. These correlations constrain the cluster mass-observable relation. We model the observables using a halo model framework, including their full non-Gaussian covariance. Forecasting constraints on cosmological and mass calibration parameters for a combination of LSST cosmic shear and Simons Observatory tSZ cluster counts, we find competitive constraints for cluster cosmology, with a factor two improvement in the dark energy figure of merit compared to LSST cosmic shear alone. We find most of the mass calibration information will be in the large and intermediate scales of the cross-correlation between cluster overdensity and cosmic shear. Finally, we find broadly comparable constraints to traditional analyses based on calibrating masses using stacked cluster lensing measurements, with the benefit of consistently accounting for the correlations with cosmic shear.
