Multi-Wavelength X-ray, SZ, and Lensing Analysis of the CLASH Clusters

CLASH 星团的多波长 X 射线、SZ 和透镜分析

• 批准号: 1313447
• 负责人: Jack Sayers
• 金额: $ 27.84万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1313447&HistoricalAwards=false
• 关键词: Multi; Wavelength; ray; SZ; Lensing

Clusters of galaxies are the largest gravitationally bound objects in the Universe and provide excellent sensitivity for determining cosmological parameters. In particular, cosmological simulations predict an approximately universal form for cluster dark matter mass profiles. This project proposes to do a modeling analysis of a sample of galaxy clusters. This analysis would provide three-dimensional shapes and alignments of the gas and dark matter in these clusters and thus allow for the physical properties of these clusters to be more accurately estimated.This project will use a three-dimensional triaxial X-ray, Sunyaev-Zel'dovich (SZ), and lensing analysis of the 25 clusters in the Cluster Lensing and Supernova survey with Hubble (CLASH) sample. The analysis will exploit the different line-of-sight dependences of the X-ray and SZ signals to constrain the three-dimensional morphologies of the clusters with the ultimate goal of testing predictions of Lambda Cold Dark Matter cosmological models in the context of large-scale structure formation.Educationally, the investigators will make regular classroom visits with primarily low-income, local high school students of diverse backgrounds to inform and inspire these students about science. In addition, the investigators will sponsor multi-week summer research programs with high school students and teachers.

星系团是宇宙中最大的引力束缚物体，为确定宇宙学参数提供了极好的灵敏度。 特别是，宇宙学模拟预测一个近似普遍的形式集群暗物质质量分布。 本计画拟对一个星系团样本进行模拟分析。 这一分析将提供这些星系团中气体和暗物质的三维形状和排列，从而更准确地估计这些星系团的物理性质。这一项目将使用三维三轴X射线、Sunyaev-Zel'dovich（SZ）和透镜分析，对哈勃星系团透镜和超新星巡天（CLASH）样本中的25个星系团进行分析。 该分析将利用X射线和SZ信号的不同视线依赖性来约束星团的三维形态，最终目标是在大规模结构形成的背景下测试Lambda冷暗物质宇宙学模型的预测。在教育方面，研究人员将定期访问主要是低收入，不同背景的当地高中学生，告知和启发这些学生对科学。 此外，研究人员将赞助与高中学生和教师为期数周的夏季研究计划。