Connecting Galaxies with Host Dark Matter Halos with Next Generation Sky Surveys

通过下一代巡天将星系与宿主暗物质晕连接起来

• 批准号: 2645783
• 金额: --
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2645783
• 关键词: Connecting; Galaxies; Host; Dark; Matter

How galaxies form in dark matter halos is still not understood in detail. This project is an observational study of the link between the galaxies we see and the dark matter, both in terms of the large-scale structure, and of the properties of the dark halos themselves.It builds on work already done combining the Galaxy And Mass Assembly (GAMA) galaxy catalog with weak lensing studies using the Kilo-Degree Survey (KiDS). Both GAMA and KiDS are state of the art but are about to be superseded by even larger and more powerful surveys. KiDS was performed with the 2.6m VST on Paranal in Chile. Right now a project on the 8m Subaru telescope is already underway with more sensitive lensing measurements, and in 2022 two new observatories - the Rubin observatory in Chile and the Euclid satellite of the European Space Agency - will start to map large areas of the sky with even higher precision, transforming this research field. At the same time, massive spectroscopic galaxy surveys will eclipse GAMA, which contains data for some 300,000 galaxies. In particular, the WAVES survey will measure millions of galaxies, over a wider area and to fainter limits than GAMA. The combination of these next-generation data sets will allow us to study the galaxy-halo connection with much higher precision, and in more detail, than was possible so far. This information is vital, fundamental input to galaxy formation theory.

暗物质晕中的星系如何形成仍不清楚。该项目是对我们所看到的星系与暗物质之间联系的观测研究，无论是在大尺度结构方面，还是在暗晕本身的特性方面。它建立在已经完成的结合星系和质量的工作的基础上使用千度巡天 (KiDS) 进行弱透镜研究的装配 (GAMA) 星系目录。 GAMA 和 KiDS 都是最先进的，但即将被更大规模、更强大的调查所取代。 KiDS 是在智利 Paranal 上使用 2.6m VST 进行的。目前，8m Subaru 望远镜的项目已经在进行中，采用更灵敏的透镜测量，到 2022 年，两个新的天文台——智利的鲁宾天文台和欧洲航天局的欧几里得卫星——将开始用甚至更高的精度，改变了这个研究领域。与此同时，大规模的光谱星系巡天将使包含约 300,000 个星系数据的 GAMA 黯然失色。特别是，与 GAMA 相比，WAVES 巡天将在更广阔的区域和更微弱的范围内测量数百万个星系。这些下一代数据集的结合将使我们能够比迄今为止更高精度、更详细地研究星系与光晕的联系。这些信息对于星系形成理论来说是至关重要的、基本的输入。