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Clusters of Galaxies: The Universe's Kaleidoscopes

星系团：宇宙的万花筒

基本信息

批准号：
2567331
负责人：
金额：
--
依托单位：
Durham University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2567331
关键词：
Clusters Galaxies Universe Kaleidoscopes

项目摘要

Clusters of galaxies act as the most powerful gravitational lenses in the Universe due to the strong concentration of matter on scales of 100-500 kpc. This is especially true for X-ray selected clusters which are preferentially centrally concentrated. We have catalogued the 200 most X-ray luminous clusters between 0.2 < z < 0.6. and we have HST, Chandra, JVLA and Herschel data for the large majority. We have an on-going VLT MUSE survey that has observations of over 120 of these clusters to identify the brightest lensed sources as well as spectral information on cluster members. These data place constraints on the nature of the background, lensed galaxies and thus the Dark Matter distribution in the clusters themselves and provide a rich legacy of targets for follow-up with the VLT, ALMA and JWST. In particular, these observations identify the systems with the brightest lines that are vital for successful AO-assisted follow-up which will sub-divide light into many more spatial elements. This project focuses on the brightest lensed sources that constrain the gravitational mass of the clusters and also the properties of the lensed galaxy. Through the unprecedented statistics our MUSE survey provides, we will address a wide range of astrophysics questions with both the sample of several hundred lensed sources and the handful of most highly amplified systems that can be followed-up with other telescopes.

星系团是宇宙中最强大的引力透镜，因为在100 - 500 kpc的尺度上物质高度集中。这对于优先集中的X射线选择的簇尤其如此。我们已经编目了200个X射线最明亮的星团，它们的亮度在0.2 <z <0.6之间。我们有HST，Chandra，JVLA和Herschel的数据。我们有一个正在进行的VLT MUSE调查，观察了超过120个这样的集群，以确定最亮的透镜源以及集群成员的光谱信息。这些数据限制了背景、透镜星系的性质，从而限制了星系团中暗物质的分布，并为VLT、阿尔马和JWST的后续工作提供了丰富的目标遗产。特别是，这些观测确定了具有最亮线条的系统，这些线条对于成功的AO辅助后续工作至关重要，AO辅助后续工作将把光细分为更多的空间元素。该项目的重点是最亮的透镜源，这些透镜源限制了星系团的引力质量以及透镜星系的性质。通过我们的MUSE调查提供的前所未有的统计数据，我们将通过数百个透镜源的样本和少数可以用其他望远镜跟踪的最高度放大的系统来解决广泛的天体物理学问题。