Dynamics of dark energy with a coupling to dark matter
Dynamics of dark energy with a coupling to dark matter
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DOI：
10.1103/physrevd.78.023505
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发表时间：
2008-07-01
影响因子：
5
通讯作者：
Maartens, Roy
中科院分区：
文献类型：
--
作者：
Boehmer, Christian G.;Caldera-Cabral, Gabriela;Maartens, Roy
暗能量和暗物质是晚期宇宙演化的主要来源。目前只能通过引力效应间接检测到它们，并且它们之间可能存在耦合而不违反观测限制。我们研究了当暗能量被建模为指数精髓并通过简单的能量交换模型与暗物质耦合时的背景动力学。我们引入了一种新形式的暗区耦合，它导致了更复杂的动态相空间，并且比以前数学上类似的耦合具有更好的物理动机。
Dark energy and dark matter are the dominant sources in the evolution of the late universe. They are currently only indirectly detected via their gravitational effects, and there could be a coupling between them without violating observational constraints. We investigate the background dynamics when dark energy is modeled as exponential quintessence and is coupled to dark matter via simple models of energy exchange. We introduce a new form of dark sector coupling, which leads to a more complicated dynamical phase space and has a better physical motivation than previous mathematically similar couplings.