Measuring Dark Matter, Neutral Hydrogen and Neutrino Mass with Next Generation Weak Lensing and Radio Data

使用下一代弱透镜和无线电数据测量暗物质、中性氢和中微子质量

基本信息

批准号：
ST/S004858/2
负责人：
Joachim Harnois-Deraps
金额：
$ 47.62万
依托单位：
Newcastle University
依托单位国家：
英国
项目类别：
Fellowship
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=ST%2FS004858%2F2
关键词：
Measuring Dark Matter Neutral Hydrogen

项目摘要

My research aims at measuring fundamental properties of three extremely elusive substances: dark matter, dark energy and neutrinos. As recently discovered, neutrinos are massive particles (Nobel Prize 2015), but their actual mass is still unknown. While we now understand how dark matter interacts with gravity, we still do not know what it is, and different cosmological measurements disagree about its abundance. Furthermore, all aspects of the dark energy are highly uncertain.This situation will change drastically with the upcoming generation of galaxy surveys such as Euclid, LSST and WFIRST. These dedicated observatories will measure properties of dark matter, dark energy and neutrinos based on their "weak gravitational lensing" signatures. This technique relies on the detection of small distortions imparted on the image of distant galaxies by the gravitational pull of foreground massive objects. Weak lensing measures the abundance and the clustering of the total foreground matter, which is uniquely affected by its different elements.I will use the latest observations from the Kilo Degree Survey, which has started to deliver exquisite weak lensing data, and will push the frontiers of our knowledge about the Universe, its content and its initial conditions. Through combining these dark matter data with independent observations of the cosmic microwave background and of the hydrogen, I will map out the global content of our Universe, component-by-component. This will be achieved with the method of 'cross-correlations', which singles out species common two both datasets.These are transforming times for the field of cosmology, and the fundamental research undertaken during this Fellowship will by central to our understanding of dark matter, neutrinos, hydrogen and dark energy. The expected outcome of the research includes the combined analyses of two lensing data sets, cosmic microwave background observations, and three dimensional maps of neutral hydrogen. It will result in at least five first-authored papers, plus a number of contributions based on sharing the simulations products that will be produced. This will directly support the future analysis of a number of scientific investigations, aiming for an impact well beyond 2030.

我的研究旨在衡量三种极为难以捉摸的物质的基本特性：暗物质，暗能量和中微子。正如最近发现的那样，中微子是巨大的颗粒（2015年诺贝尔奖），但它们的实际质量仍然未知。虽然我们现在了解暗物质与重力的相互作用，但我们仍然不知道它是什么，并且不同的宇宙学测量值不同意其丰度。此外，黑暗能源的各个方面都是高度不确定的。随着即将到来的银河系调查（例如Euclid，LSST和WFIRST），这种情况将发生巨大变化。这些专用的观测值将根据其“弱重力透镜”特征来测量暗物质，暗能量和中微子的特性。该技术依赖于通过前景的重力巨大物体的重力吸引到遥远星系图像上的小扭曲的检测。弱镜头衡量了总前景物质的丰度和聚类，这受到其不同元素的唯一影响。我将使用Kilo学位调查的最新观察结果，该观察结果已开始提供精美的弱镜头数据，并将推动我们对宇宙，内容及其初始条件的了解。通过将这些暗物质数据与宇宙微波背景和氢的独立观察结合在一起，我将逐步绘制我们宇宙的全球内容，组成部分。这将通过“互相关”的方法来实现，该方法将两个数据集中列出了两个数据集。这些正在改变宇宙学领域的时间，并且在这项研究金期间进行的基本研究将取决于我们对暗物质，中微子，氢，氢和暗能量的理解。该研究的预期结果包括对两个镜头数据集的组合分析，宇宙微波背景观测以及中性氢的三维图。它将至少产生五篇初始的论文，以及基于共享将要生产的模拟产品的许多贡献。这将直接支持对许多科学研究的未来分析，旨在在2030年以后产生影响。