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Joint, parameter-free reconstruction of the mass distribution in galaxy clusters from all available data sets

根据所有可用数据集联合、无参数重建星系团中的质量分布

基本信息

批准号：
241898342
负责人：
Professor Dr. Matthias Bartelmann
金额：
--
依托单位：
Institut für Theoretische Physik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/241898342?language=en
关键词：
Joint parameter free reconstruction mass

项目摘要

Being the largest gravitationally bound structures in the Universe, galaxyclusters play an important role for our attempts at understanding cosmic structure formation. Furthermore, their internal structure allows to constrain some of the properties of the Dark Matter. The project proposed here intends to obtain joint reconstructions of the matter distribution ingalaxy clusters from data of the strong and weak gravitational lensing effects, the X-ray emission, the thermal Sunyaev-Zeldovich effect and the kinematics of cluster galaxies, applying as little prejudice as possible.The project will be based on an existing algorithm allowing to jointly analyse data from the strong and weak gravitational lensing effects on an adaptive grid. The additional observables will be related to the gravitational potential of the galaxy clusters by physical models and regularised deprojection. The gravitational potential can then be projected and combined with the gravitational lensing effects. The respective substantial extension of our algorithm, the development of suitable physical models and the relaxation of restricting symmetry and stability assumptions to the largest feasible extent are substantial goals of the proposed research. When completed, an essentially parameter-free, adaptive algorithm will be provided which combines all types of observational data from galaxy clusters in joint reconstructions of their mass distribution.

星系团作为宇宙中最大的引力束缚结构，在我们试图理解宇宙结构形成方面起着重要作用。此外，它们的内部结构允许限制暗物质的一些属性。本文提出的项目旨在利用星系团的强、弱引力透镜效应、X射线辐射、热Sunyaev-Zeldovich效应和运动学数据联合重建星系团的物质分布，该项目将基于一种现有的算法，允许联合分析来自强引力透镜效应和弱引力透镜效应的数据。自适应网格额外的观测量将通过物理模型和正则化的反投影与星系团的引力势相关。然后，引力势可以被投射并与引力透镜效应相结合。我们的算法，适当的物理模型的发展和放松限制对称性和稳定性的假设，以最大的可行程度上各自的实质性扩展是所提出的研究的实质性目标。完成后，将提供一种基本上无参数的自适应算法，将星系团的所有类型的观测数据结合起来，共同重建其质量分布。