Assessing the systematic uncertainties influencing weak gravitational lensing of 21cm emission for galaxies

这将涉及宇宙学流体动力学模拟研究，在最先进的EAGLE和BAHAMAS套件的开发中发挥主导作用。他们将开发一系列广泛的算法，目的是在适合解释关键观测数据的一系列波段内制作“天空图”，以帮助解释现有的观测调查并指导未来的观测战略。这些必须是并行的，并且能够容纳包含数十亿分辨率元素的数据集，每个元素由多个变量描述。学生将通过Virgo宇宙超级计算机模拟联盟的成员资格以及与Hartree中心的合作，获得一级HPC设施。一个特别有趣的元素的必要技术，例如射线跟踪，是他们适合并行化的新的计算架构。由于与欧洲中期天气预报中心合作发现了一个类似的问题，黎巴嫩边界网的研究人员已经对这一因素进行了调查。

This will involve studies of cosmological hydrodynamical simulations, playing leading roles in the development of the state-of-the-art EAGLE and BAHAMAS suites. They will develop a broad range of algorithms aimed at the production of "sky maps" in a range of wavebands appropriate for the interpretation of key observables, to help interpret existing observational surveys and guide future observational strategies. These must be massively-parallel and capable of accommodating datasets comprising billions of resolution elements, each described by multiple variables. The student will have access to Tier-1 HPC facilities via membership of the Virgo Consortium for Cosmological Supercomputer Simulations and collaboration with the Hartree centre. A particularly interesting element of the necessary techniques, e.g. ray-tracing, is their suitably for parallelisation on new computational architectures. This element has already been investigated by LBDN researchers as a result of a similar issue being identified through work with the European Centre for Medium-term Weather Forecasting.