Cosmology from the Cosmic Microwave Background

宇宙微波背景的宇宙学

• 批准号: 2654455
• 金额: --
• 依托单位: University of Sussex
• 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-2654455
• 关键词: Cosmology; Cosmic; Microwave; Background

The cosmic microwave background (CMB) originates from a time when the universe was only a few hundred thousand years old, a distance 98% of the way to the edge of the observable universe. The Planck satellite has observed the fluctuations in the CMB with unprecedented precision, and now a new wave of observations are measuring the polarization with ever better precision. The polarization gives a powerful way to constrain early-universe physics (via the so-called "B-modes" from gravity waves from the early universe, on much larger scales than the waves recently detected by Ligo). B-mode polarization also gives a measure the gravitational lensing of the CMB, leading to a projected map of all the matter in the universe between us and the big bang. Sussex is a member of the Simons Observatory and members of the group are also involved in ongoing Polearbear and Simons Array observations. We also have world-leading theoretical expertise, developing several of the key codes that are used to make the cosmological predictions. This student will be part of a team working on developing analysis tools, theoretical predictions and polarization data analysis over the time of the PhD. The project includes some analytic work, as well as extensive numerical calculations and simulations.

宇宙微波背景辐射（CMB）起源于宇宙只有几十万年的时候，距离可观测宇宙边缘的98%。普朗克卫星已经以前所未有的精度观测到了CMB的波动，现在新一波的观测正在以更高的精度测量偏振。极化提供了一种强有力的方式来约束早期宇宙物理学（通过来自早期宇宙的重力波的所谓“B模式”，其尺度比Ligo最近探测到的波大得多）。B模式偏振也给出了一个测量CMB引力透镜的方法，从而得到了我们和大爆炸之间宇宙中所有物质的投影图。苏塞克斯是西蒙斯天文台的成员，该组织的成员也参与了正在进行的Polearbear和西蒙斯阵列观测。我们还拥有世界领先的理论专业知识，开发了用于进行宇宙学预测的几个关键代码。该学生将成为一个团队的一部分，该团队致力于开发分析工具，理论预测和偏振数据分析。该项目包括一些分析工作，以及广泛的数值计算和模拟。