Clusters of Galaxies: The Universe's Kaleidoscopes

星系团：宇宙的万花筒

• 批准号: 2567331
• 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

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.

由于物质在 100-500 kpc 尺度上高度集中，星系团成为宇宙中最强大的引力透镜。对于优先集中集中的 X 射线选择的簇来说尤其如此。我们对 0.2 < z < 0.6 之间的 200 个 X 射线最亮星团进行了编目。我们拥有大多数的 HST、Chandra、JVLA 和 Herschel 数据。我们正在进行一项 VLT MUSE 调查，对其中 120 多个星团进行了观测，以确定最亮的透镜源以及星团成员的光谱信息。这些数据对背景的性质、透镜星系以及星团本身的暗物质分布进行了限制，并为 VLT、ALMA 和 JWST 的后续工作提供了丰富的目标遗产。特别是，这些观察结果确定了具有最亮线的系统，这对于成功的 AO 辅助后续行动至关重要，该后续行动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光源，这些光源限制了星团的引力质量以及透镜星系的特性。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放大系统来解决广泛的天体物理学问题。