冷暗物质子结构的数值追踪及其湮灭辐射的观测

Subhalo Tracing in Simulations and Subhalo Observation in Gamma-rays

当前对宇宙的主要观测都指向物质成分为冷暗物质主导的～CDM宇宙学.在冷暗物质的宇宙中,原初的微小扰动在引力作用下增长为位力化的团块,称为暗物质晕.小质量暗晕最先形成,它们之间的相互并合形成了更大质量的暗晕.并合之后,前身暗晕在当前载晕中会以自束缚的子结构形式存活很长时间,称为子晕.在数值模拟中我们可以对子晕的形成和演化进行详细的研究.这种研究为星系形成演化模型提供了基础,同时也影响了我们观测上探测暗物质的方式。

Current major observations of the Universe favor the concordant ACDM cosmology, in which the matter content is dominated by cold dark matter （CDM）. In this CDM universe, small perturbations from the initial condition grow into clumps of virilized structure called dark matter haloes. Small haloes form early and later merge to form bigger haloes. As a result, dark matter haloes host plenty of substructures called subhaloes which are the self- bound remnants of their progenitor haloes. These subhaloes could be studied in detail with the help of numerical simulations, which then could provide input into theories of galaxy formation, and also influence the way dark matter could be detected.