Cosmology without assuming a cosmology: data analysis in the Euclid era

将于2022年发射的欧几里得卫星将很快迎来一个拥有丰富宇宙学数据的新时代。这是投资准备数据分析和收获使命科学回报的时候了。在这个项目中，我建议以一种新颖的方式对欧几里得数据的分析做出贡献，即专注于可以在不假设宇宙学模型的情况下测量的可观测量。在以前的工作中，我在背景和扰动水平（线性和非线性）确定了这些观测值，并探索了测量方法。欧几里得，沿着其他现在和未来的数据集，现在提供了令人兴奋的可能性，进行这样的措施，并在一个模型独立的方式回答问题，如空间曲率的值或爱因斯坦的引力的有效性范围。该项目将补充和加强欧几里得标准数据分析，并为年轻的合作者提供机会，成为未来十年最重要的科学企业之一。

The Euclid satellite, to be launched in 2022, will usher soon a new era of abundant cosmological data. This is the time to invest in preparing the data analysis and to harvest the science return of the mission. In this project, I propose to contribute to the analysis of Euclid data in a novel way, that is, focusing on observables that can be measured without assuming a cosmological model. In previous work, I identified such observables at the background and perturbation level (both linear and non-linear), and explored the methodology for their measurements. Euclid, along with other present and future datasets, offers now the exciting possibility to carry out such measures and to answer in a model-independent way questions like the value of the spatial curvature or the range of validity of Einstein's gravitation. This project will complement and reinforce Euclid standard data analysis and give the opportunity to young collaborators to be part of one of the most important scientific enterprise of the coming decade.