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Test particles in Cosmic string space-times

测试宇宙弦时空中的粒子

基本信息

批准号：
166999034
负责人：
Professorin Dr. Betti Hartmann
金额：
--
依托单位：
Zentrum für angewandte Raumfahrttechnologie und Mikrogravitation (ZARM)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/166999034?language=en
关键词：
Test particles Cosmic string space

项目摘要

Cosmic strings are a general prediction of inflationary models resulting from Grand Unified Theories and String Theory. An observation of these objects would give strong support of these theories. Observations of cosmic strings are either possible by identifying their signals in the Cosmic Microwave background or by direct detection through particle motion in cosmic string space–times, which we are concerned with in this project. The aim of this project is the systematic analysis of geodesics in space–times containing cosmic strings, in particular the determination of the complete set of analytical and also of numerical solutions and the calculation of observable consequences. The starting point are space-times that contain cosmic strings in the thin string limit, where analytic solutions of the geodesic equations are possible. In contrast to this, cosmic string solutions with finite core radius are only known numerically such that the corresponding geodesic equations can also only be solved numerically. This project is aimed at strengthening the collaborations between the Field theory group at Jacobs University Bremen and the Fundamental Physics group at ZARM, Bremen. The ZARM group has strong expertise in analytic and numerical solutions of geodesic equations, while the group at Jacobs University has strong expertise in solving Einstein’s equations analytically and numerically. The present project brings both expertises together.

宇宙弦是由大统一理论和弦理论产生的暴胀模型的一般预测。对这些天体的观测将有力地支持这些理论。宇宙弦的观测可以通过在宇宙微波背景中识别它们的信号来实现，也可以通过宇宙弦时空中的粒子运动来直接探测，这是我们在这个项目中所关注的。这个项目的目的是系统地分析包含宇宙弦的时空测地线，特别是确定完整的解析解和数值解以及可观察结果的计算。起点是在细弦极限中包含宇宙弦的时空，在那里测地线方程的解析解是可能的。与此相反，具有有限核心半径的宇宙弦解只能在数值上已知，因此相应的测地线方程也只能在数值上求解。该项目旨在加强不来梅雅各布斯大学场论小组和不来梅ZARM基础物理小组之间的合作。ZARM小组在测地线方程的解析和数值解方面有很强的专业知识，而雅各布斯大学的小组在解析和数值解爱因斯坦方程方面有很强的专业知识。目前的项目将这两种专业知识结合在一起。