Conventionally, in galaxy surveys, cosmological constraints on the growth and expansion history of the Universe have been obtained from the measurements of redshift-space distortions and baryon acoustic oscillations embedded in the large-scale galaxy density field. In this paper, we study how well one can improve the cosmological constraints from the combination of the galaxy density field with velocity and tidal fields, which are observed via the kinetic Sunyaev-Zel’dovich (kSZ) and galaxy intrinsic alignment (IA) effects, respectively. For illustration, we consider the deep galaxy survey by Subaru Prime Focus Spectrograph, whose survey footprint perfectly overlaps with the imaging survey of the Hyper Suprime-Cam and the CMB-S4 experiment. We find that adding the kSZ and IA effects significantly improves cosmological constraints, particularly when we adopt the nonflat cold dark matter model which allows both time variation of the dark energy equation-of-state and deviation of the gravity law from general relativity. Under this model, we achieve 31% improvement for the growth index $\gamma$ and $>35\%$ improvement for other parameters except for the curvature parameter, compared to the case of the conventional galaxy-clustering-only analysis. As another example, we also consider the wide Galaxy survey by the Euclid satellite, in which shapes of galaxies are noisier but the survey volume is much larger. We demonstrate that when the above model is adopted, the clustering analysis combined with kSZ and IA from the deep survey can achieve tighter cosmological constraints than the clustering-only analysis from the wide survey.

中文翻译：

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加强对暗能量和引力的几何和动力学约束：星系聚集、内在排列和动力学 Sunyaev-Zel'dovich 效应

传统上，在星系调查中，对宇宙生长和膨胀历史的宇宙学约束是通过对嵌入在大尺度星系密度场中的红移空间畸变和重子声学振荡的测量获得的。在本文中，我们研究了如何通过星系密度场与速度场和潮汐场的结合来改善宇宙学约束，这些约束是通过动力学 Sunyaev-Zel'dovich (kSZ) 和星系固有对齐 (IA) 效应观察到的， 分别。为了说明，我们考虑了 Subaru Prime Focus Spectrograph 的深星系调查，其调查足迹与 Hyper Suprime-Cam 和 CMB-S4 实验的成像调查完全重叠。我们发现添加 kSZ 和 IA 效应显着改善了宇宙学约束，特别是当我们采用非平坦冷暗物质模型时，该模型既允许暗能量状态方程的时间变化，又允许引力定律偏离广义相对论。在这个模型下，我们实现了增长指数 31% 的提升$\gamma$和$>35\%$与传统的仅星系团分析的情况相比，除了曲率参数之外的其他参数的改进。再举一个例子，我们还考虑了欧几里德卫星对宽星系的调查，其中星系的形状比较嘈杂，但调查的体积要大得多。我们证明，当采用上述模型时，深度调查中的聚类分析结合 kSZ 和 IA 可以实现比广泛调查中的仅聚类分析更严格的宇宙学约束。