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arXiv 1204.5482astro-ph.COgr-qchep-phhep-th
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模拟暗能量的唯象方法

The phenomenological approach to modeling the dark energy

Martin Kunz

摘要:

在这篇简短的评论中,我们首先讨论为什么我们应该研究LCDM之外的宇宙学模型。然后,我们展示了如何描述暗能量或修改后的重力模型的流体语言的帮助下,一个背景和两个扰动量。我们回顾了一系列的暗能量模型,并研究它们如何融入现象学框架,包括像幻影穿越,声速不同的c和非零各向异性应力,以及这些有效量是如何与底层的物理模型。我们还讨论了宇宙学数据可以测量的极限,以及框架的一些挑战。

英文摘要:

In this mini-review we discuss first why we should investigate cosmological models beyond LCDM. We then show how to describe dark energy or modified gravity models in a fluid language with the help of one background and two perturbation quantities. We review a range of dark energy models and study how they fit into the phenomenological framework, including generalizations like phantom crossing, sound speeds different from c and non-zero anisotropic stress, and how these effective quantities are linked to the underlying physical models. We also discuss the limits of what can be measured with cosmological data, and some challenges for the framework.

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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