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

这将涉及宇宙流体动力学模拟的研究，在最先进的EAGLE和巴哈马套房的开发中发挥主导作用。他们将开发一系列广泛的算法，目的是在一系列适合解释关键观测数据的波段内制作“天空地图”，以帮助解释现有的观测调查并指导未来的观测策略。这些必须是大规模并行的，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。该学生将通过处女座宇宙超级计算机模拟联盟的成员资格以及与哈特里中心的合作，获得一级HPC设施。必要技术的一个特别有趣的元素，例如光线追踪，是它们适合在新的计算架构上并行化。由于与欧洲中期天气预报中心的合作发现了一个类似的问题，LBDN的研究人员已经对这一因素进行了研究。

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.