Combining cosmic shear and large-scale structure data to constrain the acceleration of the Universe.

结合宇宙剪切和大尺度结构数据来约束宇宙的加速。

• 批准号: 1950358
• 金额: --
• 依托单位: University of Sussex
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1950358
• 关键词: Combining; cosmic; shear; large; scale

Recent observations inform us that the Universe is undergoing a phase of accelerated expansion. Identifying the physics which explains this is one of the great unsolved problems in astrophysics. A number of possible explanations have been proposed such as a non-zero vacuum energy or large-scale modifications to Einstein's theory of gravity. In this project we will examine how the combination of various probes such as the weak lensing aperture mass statistics and galaxy redshift space power spectrum and bispectrum can help shed new light on this great mystery. The projects that you will undertake will develop your understanding of theoretical physics, numerical cosmology and statistical modelling of data. We will make use of KiDS, GAMMA and BOSS survey data and also state of the art numerical simulations.

最近的观测告诉我们，宇宙正在经历一个加速膨胀的阶段。确定解释这一现象的物理学是天体物理学中未解决的重大问题之一。人们提出了许多可能的解释，例如非零真空能量或对爱因斯坦引力理论的大规模修改。在这个项目中，我们将研究如何结合各种探测，如弱透镜孔径质量统计和星系红移空间功率谱和双谱可以帮助揭示这个伟大的奥秘。您将承担的项目将发展您对理论物理，数值宇宙学和数据统计建模的理解。我们将利用KiDS、GAMMA和BOSS调查数据以及最先进的数值模拟。