arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 0803.4504astro-ph
收藏

观测检验暗能量模型的一种新方法

A New Approach to Testing Dark Energy Models by Observations

Je-An Gu, Chien-Wen Chen, Pisin Chen

备注：
19 pages, 5 figures
发表信息：
New J.Phys.11:073029,2009
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

提出了一种新的暗能量模型与观测一致性检验方法。为了测试一类暗能量模型，我们建议引入一个特征Q（z），它通常随红移z而变化，但在这些模型中扮演着一个（恒定的）独特参数的角色。然后，通过从观测数据重建dQ（z）/dz并将其与零进行比较，我们可以评估数据与所考虑的模型之间的一致性。对于通过测试的一类模型，我们可以通过从数据重建Q（z）来进一步约束这些模型的不同参数。为了证明，在本文中，我们集中在精华。特别地，我们通过广泛使用的参数化的暗能量状态方程，w（z）= w_0 + w_a z/（1+z），数据分析检查指数势和幂律势。这种一致性测试方法特别有效，因为对于所有模型，我们只调用一个参数空间的约束，通过选择可以很容易地访问。我们方法的一般原理并不局限于暗能量。它还可以应用于各种宇宙学模型的检验，甚至可以应用于宇宙学范围以外的其他领域的模型的检验。

英文摘要：

We propose a new approach to the consistency test of dark energy models with observations. To test a category of dark energy models, we suggest introducing a characteristic Q(z) that in general varies with the redshift z but in those models plays the role of a (constant) distinct parameter. Then, by reconstructing dQ(z)/dz from observational data and comparing it with zero we can assess the consistency between data and the models under consideration. For a category of models that passes the test, we can further constrain the distinct parameter of those models by reconstructing Q(z) from data. For demonstration, in this paper we concentrate on quintessence. In particular we examine the exponential potential and the power-law potential via a widely used parametrization of the dark energy equation of state, w(z) = w_0 + w_a z/(1+z), for data analysis. This method of the consistency test is particularly efficient because for all models we invoke the constraint of only a single parameter space that by choice can be easily accessed. The general principle of our approach is not limited to dark energy. It may also be applied to the testing of various cosmological models and even the models in other fields beyond the scope of cosmology.

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。

↑