Precision Measurements in the Intergalactic Medium: Simulations and Observations

星际介质中的精密测量：模拟和观测

• 批准号: 0507717
• 负责人: David Tytler
• 金额: $ 82.6万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing 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=0507717&HistoricalAwards=false
• 关键词: Precision; Measurements; Intergalactic; Medium; Simulations

AST-0507717TytlerThe space between the galaxies is most of the volume of the Universe, and contains most of the dark matter and gas. That gas is readily observed in the spectra of quasars and its detailed properties contain a highly sensitive record of the main parameters of the Universe. This project will use a combination of observations and simulations to read that record, focusing on two key interrelated topics: the measurement of precise cosmological and astrophysical parameters, and the detection and measurement of the effects of energy flows from quasars and galaxies into the intergalactic gas. A large set of high resolution quasar spectra from the Keck observatory will be compared to various sophisticated simulations to study the amount of dark energy, the amplitude and slope of the power spectrum of matter on small scales, the ionization and temperature of the intergalactic gas, the intensity and spectrum of the ionizing radiation, and the energy input from quasars and galaxies, including the input and distribution of metals.The broader impact of the work builds upon the team's long record of integrating education and diversity with their research. Past emphasis on under-represented groups will continue.

AST-0507717TYTLER这是星系之间的空间，是宇宙的大部分，并且包含大部分的暗物质和气体。 在类星体的光谱中很容易观察到这种气体，其详细特性包含了宇宙主要参数的高度敏感记录。 该项目将结合观测和模拟来读取该记录，重点介绍两个关键相互关联的主题：精确的宇宙学和天体物理参数的测量，以及从类似和星系到层次气体的能量流的效应的检测和测量。 将将来自凯克天文台的大量高分辨率的类星体光谱与各种复杂的模拟进行比较基于团队将教育和多样性与研究的悠久记录建立在基础上。 过去对代表性不足的群体的强调将继续。