Precision cosmology from high-precision theoretical template for large-scale structure of the Universe

最近在宇宙学观测方面的进展导致了“标准宇宙学”的建立，宇宙学现在将进入精密宇宙学时代，以深入了解宇宙的本质和起源。在未来十年，超大规模和/或高精度的宇宙学观测将是提高我们对宇宙认识的关键，而为了探测/测量微弱但具有物理意义的信号，对宇宙学测量的精度理论模板要求很高。在这个项目中，我们聚焦于宇宙的大尺度结构作为一个有前途的宇宙学探测器，并开发了分析框架来计算下一代星系红移测量的高精度理论模板。基于大尺度结构的微扰理论，我们成功地将各种观测/物理系统学融入到精度模板中，包括非线性引力演化、红移空间扭曲和星系偏向。这个项目中开发的理论模板将对解释来自即将到来的光谱调查的宇宙学数据起到非常关键的作用，例如日本天文和宇宙学小组的SuMIRe计划(Subaru测量成像和红移)。

Recent progress on cosmological observations has led to the establishment of the" standard cosmologica", and the cosmology is now going to enter the era of precision cosmology, to deeply understand the nature and origin of the Universe. In the coming decade, extremely large-scale and/or high-precision cosmological observations will be the keys to improve our understanding of the Universe, and in order to detect/measure a weak but physically important signal, highly demanding is the precision theoretical template for cosmological measurements. In this project, we have focused on the large-scale structure of the universe as a promising cosmological probe, and developed analytical frameworks to compute high-precision theoretical template for next-generation galaxy redshift surveys. Based on the perturbation theory of large-scale structure, we have succeeded to incorporate the various observational/physical systematics into the precision template, including the non-linear gravitational evolution, redshift-space distortions, and galaxy biasing. The theoretical template developed in this project will play a very crucial role to interpret cosmological data from upcoming spectroscopic surveys such as SuMIRe project(Subaru Measurement of Imaging and Redshifts) in Japanese astronomy and cosmology group.