The Baryon Distribution in Galaxy Clusters and Groups; A New Look with the Sunyaev-Zel'dovich Array

星系团和星系团中的重子分布；

• 批准号: 0507545
• 负责人: Amber Miller
• 金额: $ 17.59万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507545&HistoricalAwards=false
• 关键词: Baryon; Distribution; Galaxy; Clusters; Groups

AST-0507545MillerThis project will make the first measurement of Sunyaev-Zel'dovich Effect (SZE) scaling relations, using a sample of both rich clusters and groups of galaxies to progress toward a resolution of a long-standing problem in structure formation. Observations suggest that supernova or AGN heating and gas cooling are significant for the formation of clusters and groups of galaxies. The SZE is a unique way to probe high-redshift low-density objects, complementary to observations of the X-ray luminosity. This is new and exciting science, from a modest research effort leveraged on existing investment in a nearly-completed interferometric array of telescopes, the Sunyaev-Zel'dovich Array (SZA). Two cluster samples with measured central SZE decrement and total integrated decrement will constrain the linkage of X-ray luminosity to baryon depletion or to increased gas entropy. Understanding the relationship between cluster observables and cluster mass is invaluable for using clusters as cosmological probes.This project primarily supports a graduate student, already involved in construction and deployment of the SZA, to pursue related thesis work and to continue an established relationship between the university laboratory and a local high school teacher and her students.

AST-0507545 Miller该项目将首次测量Sunyaev-Zel 'dovich效应（SZE）的标度关系，使用丰富的星系团和星系群的样本，以解决结构形成中的一个长期存在的问题。 观测表明，超新星或活动星系核的加热和气体冷却对于星系团和星系群的形成具有重要意义。 SZE是探测高红移低密度天体的一种独特方式，与X射线光度的观测相辅相成。 这是一项新的令人兴奋的科学，它来自于一项适度的研究工作，该研究利用了对一个即将完成的干涉测量望远镜阵列（Sunyaev-Zel'dovich Array，SZA）的现有投资。 两个测量到中心SZE衰减和总积分衰减的星系团样本将限制X射线光度与重子耗尽或增加气体熵的联系。 了解星团观测量和星团质量之间的关系对于利用星团作为宇宙学探测器是非常宝贵的。本项目主要支持一名已经参与SZA建设和部署的研究生进行相关的论文工作，并继续大学实验室与当地高中教师和她的学生之间的既定关系。