权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Dynamics in the small and large: linking galaxy formation to the next generation of galaxy surveys

小动态和大动态：将星系形成与下一代星系巡天联系起来

基本信息

批准号：
341284-2008
负责人：
Thacker, Robert
金额：
$ 1.86万
依托单位：
Saint Mary's University
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2009
资助国家：
加拿大
起止时间：
2009-01-01 至 2010-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=429566
关键词：
Dynamics small large linking galaxy

项目摘要

Galaxies of different types and age exhibit different clustering statistics. Thus, an understanding of galaxy formation and evolution is a prerequisite to understanding the large-scale distribution of galaxies. Successful analysis of the next generation of galaxy surveys will be partially determined by how far we advance our knowledge of galaxy formation in the immediate future. Moving the boundaries of our knowledge forward requires that we use state-of-the-art numerical simulation techniques to create virtual universes that contain simulated galaxies within them. By changing the underlying physics models we can study the collective effect of the billions of stars that make up a single galaxy. The birth, evolution and death of stars, along with an unseen dark matter component, all combine to determine the parameters of galaxies, such as rotation speed and luminosity. The research outlined in this proposal will systematically improve our knowledge of the role of star formation in galaxy evolution while at the same time examining issues in large-scale structure. Most importantly, the first simulation of an entire galaxy with sufficient resolution to pick out individual massive stars will be undertaken. The information drawn from this landmark simulation will allow us to test not only theories of galaxies but also those of the interstellar medium that exists between stars.

不同类型和年龄的星系具有不同的星系团统计数据。因此，了解星系的形成和演化是了解星系大尺度分布的先决条件。下一代星系调查的成功分析将部分取决于我们在不久的将来对星系形成的知识发展到什么程度。要向前推进我们的知识边界，我们需要使用最先进的数值模拟技术来创建包含模拟星系的虚拟宇宙。通过改变基本的物理模型，我们可以研究组成一个星系的数十亿颗恒星的集体效应。恒星的诞生、演化和灭亡，以及一个看不见的暗物质成分，都决定了星系的参数，如自转速度和光度。这项建议中概述的研究将系统地提高我们对恒星形成在星系演化中的作用的认识，同时研究大尺度结构中的问题。最重要的是，将对整个星系进行首次模拟，以足够的分辨率分辨出单个大质量恒星。从这个里程碑式的模拟中获得的信息将使我们不仅可以测试星系理论，还可以测试存在于恒星之间的星际介质的理论。