Cosmology from the Cosmic Microwave Background

宇宙微波背景（CMB）起源于宇宙只有几十万年历史的时候，那时距离可观测宇宙边缘的距离只有98%。普朗克卫星以前所未有的精度观测到了宇宙微波背景的波动，现在一波新的观测正在以更高的精度测量偏振。这种偏振提供了一种强有力的方法来约束早期宇宙的物理学（通过早期宇宙引力波的所谓“b模式”，其尺度比Ligo最近探测到的引力波大得多）。b模偏振也可以测量宇宙微波背景的引力透镜效应，从而绘制出宇宙中从我们到大爆炸之间的所有物质的投影图。苏塞克斯是西蒙斯天文台的成员，该小组的成员也参与了正在进行的极地熊和西蒙斯阵列的观测。我们还拥有世界领先的理论专业知识，开发了一些用于进行宇宙学预测的关键代码。该学生将在攻读博士学位期间加入一个团队，开发分析工具、理论预测和极化数据分析。该项目包括一些分析工作，以及广泛的数值计算和模拟。

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.