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arXiv 0911.4820astro-ph.CO
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观测对耦合暗能量模型的约束

Constraint on Coupled Dark Energy Models from Observations

Jun-Qing Xia

摘要:

耦合的暗能量模型,其中的精粹标量场非平凡地耦合到冷的暗物质,已被提出来解释符合问题。本文研究了耦合暗能量模型的扰动以及这种相互作用对当前观测的影响。在这里,我们特别注意它对后期综合萨克斯-沃尔夫(ISW)效应的影响。我们从目前的观测数据对这种相互作用的约束进行了全球分析。将典型的指数形式作为相互作用形式,得到了在95%置信水平下,暗扇区间相互作用的强度约束为$β<0.085$。此外,我们发现,未来的测量误差更小的酒吧可以提高耦合强度的约束的一个因素,当与目前的约束。

英文摘要:

The coupled dark energy models, in which the quintessence scalar field nontrivially couples to the cold dark matter, have been proposed to explain the coincidence problem. In this paper we study the perturbations of coupled dark energy models and the effects of this interaction on the current observations. Here, we pay particular attention to its imprint on the late-time Integrated Sachs-Wolfe (ISW) effect. We perform a global analysis of the constraints on this interaction from the current observational data. Considering the typical exponential form as the interaction form, we obtain that the strength of interaction between dark sectors is constrained as $β<0.085$ at 95% confidence level. Furthermore, we find that future measurements with smaller error bars could improve the constraint on the strength of coupling by a factor two, when compared to the present constraints.

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。

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