arXiv 1209.52192012-09gr-qcastro-ph.CO

Dirac Born Infeld暗能量与暗物质相互作用的动力学

Dynamics of Dirac-Born-Infeld dark energy interacting with dark matter

Chakkrit Kaeonikhom, Douglas Singleton, Sergey V. Sushkov, Nattapong Yongram

备注：: 10 pages revtex two-column format, 4 figures (N.Y. corresponding author). Changes to match published version
发表信息：: Phys.Rev. D86 (2012) 124049
DOI：: 10.1103/PhysRevD.86.124049

摘要：

研究了暗物质与暗能量相互作用的动力学过程。这里考虑的DBI暗能量模型有一个非标准动能项的标量场，并具有幂律函数的势和膜张力。这里考虑的新特征是DBI的暗能量和暗物质之间的相互作用，通过DBI标量场和暗物质流体之间的现象学相互作用。我们分析了两种不同类型的DBI标量场和暗物质流体之间的相互作用。特别是，我们研究的相空间图，并寻找临界点的相空间是稳定的，并导致加速，后期的扩张。在一般情况下，我们发现，这两个黑暗的组件之间的相互作用似乎不会引起后期的加速膨胀。然而，相互作用可以使系统相空间中的临界点稳定。这种稳定性是否发生取决于两个暗分量之间相互作用的形式。

英文摘要：

We study the dynamics of Dirac-Born-Infeld (DBI) dark energy interacting with dark matter. The DBI dark energy model considered here has a scalar field with a nonstandard kinetic energy term, and has potential and brane tension that are power-law functions. The new feature considered here is an interaction between the DBI dark energy and dark matter through a phenomenological interaction between the DBI scalar field and the dark matter fluid. We analyze two different types of interactions between the DBI scalar field and the dark matter fluid. In particular we study the phase-space diagrams of and look for critical points of the phase space that are both stable and lead to accelerated, late-time expansion. In general we find that the interaction between the two dark components does not appear to give rise to late-time accelerated expansion. However, the interaction can make the critical points in the phase space of the system stable. Whether such stabilization occurs or not depends on the form of the interaction between the two dark components.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文