Title: Exploring Cosmic Origins with CORE: Cosmological Parameters Show Chinese title

Title: 利用CORE探索宇宙起源：宇宙参数

Abstract: We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume LCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base LCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. (ABRIDGED) Show Chinese abstract

Abstract: 我们预测了专门用于绘制宇宙微波背景（CMB）偏振图的CORE空间任务所能实现的主要宇宙学参数限制。CORE最近响应欧洲航天局（ESA）第五次中型任务提案征集（M5）而提交。在这里，我们报告了关于我们预先提交的研究结果，该研究探讨了各种仪器选项的影响，特别是望远镜大小和灵敏度水平，并回顾了该任务提出的巨大变革潜力。具体来说，我们评估了根据预期的CMB特性对广泛的基本参数的影响，其中其他论文集中于控制天体物理和仪器残余系统误差。在这篇论文中，我们假设只有少数中央CORE频率通道可用于我们的目的，其余则用于清除天体物理污染物。在理论方面，我们以LCDM作为一般框架，并量化了CORE相对于Planck 2015发布所获得的当前约束的改进。我们还研究了CORE与未来重子声波振荡和大尺度结构实验（如DESI和Euclid）的联合灵敏度。对暴涨物理的特定约束将在系列论文的另一篇中介绍。除了描述平坦宇宙中物质内容的基态LCDM的六个参数（即从暴涨产生的绝热标量原始涨落），我们还推导了像描述曲率、中微子物理、额外轻遗迹、原初氦丰度、暗物质湮灭、复合物理、基本常数变化、暗能量、修改引力、再电离和宇宙双折射等参数的精度。