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 Both GAMA and KiDS are state of the art but are about to be superseded by even larger and more powerful surveys.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.

星系是如何在暗物质晕中形成的仍然没有详细的了解。这个项目是一个观测研究我们所看到的星系和暗物质之间的联系，无论是在大尺度结构方面，还是在暗晕本身的性质方面。它建立在已经完成的工作基础上，结合了星系和质量大会（GAMA）星系目录和利用千度巡天（KiDS）进行的弱透镜研究。GAMA和KiDS都是最先进的，但即将被更大、更强大的调查所取代。KiDS在智利Paranal使用2.6 m VST进行。目前，8米斯巴鲁望远镜的一个项目已经在进行中，它将进行更灵敏的透镜测量，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--将开始以更高的精度绘制大面积的天空，改变这一研究领域。与此同时，大规模的光谱星系调查将使GAMA黯然失色，GAMA包含大约30万个星系的数据。特别是，WAVES调查将测量数百万个星系，比GAMA更广泛的区域和更微弱的限制。这些下一代数据集的组合将使我们能够以比迄今为止更高的精度和更详细的方式研究星系-晕的联系。这些信息对星系形成理论来说是至关重要的基本输入。