Measuring Dark Energy from Euclid without Systematic Effects

欧几里得是欧空局/美国宇航局的一项使命，将于2023年发射。它将调查河外天空的3/4，回到100亿年前，产生数十亿星系的PB级数据集。欧几里得是围绕一种称为弱透镜的技术设计和建造的--弱透镜是由暗物质对每个星系的图像造成的扭曲的引力透镜效应。在MSSL中，我们领导了欧几里得的弱透镜分析，并建造了欧几里得维斯仪器（有史以来为天文学发射的最大的全图像相机）。这个博士项目是工作和领导欧几里得弱透镜分析的一部分;一个独特的和历史上重要的机会是在一个新的和变革性的使命的核心，这将改变我们对宇宙的看法。具体来说，这项工作将是发展和整合新的见解，关于我们如何解释数据中的任何剩余系统效应，这是一个微妙但至关重要的问题，进入宇宙学参数分析管道，然后使用这些管道来探索宇宙尺度中爱因斯坦广义相对论的偏差。

Euclid is an ESA/NASA mission that will launch in 2023. It will survey 3/4 of the extragalactic sky, back in time over 10 billion years, resulting in a Petabyte scale data set of Billions of galaxies. Euclid is designed and built around a technique called weak lensing - that is the distorting, gravitational lensing effect caused by dark matter on the images of every galaxy. In MSSL we lead the weak lensing analysis in Euclid, and built the Euclid VIS Instrument (the largest full-image camera ever launched for astronomy). This PhD project is to work on and lead part of the weak lensing analysis for Euclid; a unique and historically important opportunity to be at the heart of a new and transformative mission that will change our view of Universe. Specifically, the work will be to develop and integrate new insights on how we account for any residual systematic effects in the data, which is a subtle yet critically important issue, into the cosmological parameter analysis pipelines, and then to use these pipelines to explore deviations from Einstein's general relativity in cosmological scales.