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 0911.4858astro-ph.CO
收藏

标准宇宙学模型的模型无关检验

Model independent tests of the standard cosmological model

Arman Shafieloo, Chris Clarkson

摘要:

暗能量问题已经引起了人们的猜测,不仅LCDM可能是错误的,而且FLRW模型本身甚至可能无法提供正确的背景模型家族。我们讨论了如何直接测量H(z)可以用来制定宇宙学的标准范式的测试。这些测量本身可用于测试与平面LCDM的偏差。当与超新星距离相结合时,哈勃速率测量提供了对哥白尼原理和标准模型的均匀性假设的测试,该假设独立于暗能量或基于度量的引力理论。该测试的修改还提供了一个独立于平坦度的模型,该平坦度将曲率确定与暗能量去相关。我们调查这些测试使用哈勃率测量年龄数据,以及从哈勃率推断,从最近的测量的重子声学振荡。虽然目前的数据太弱,无法说明任何重大问题,但这些测试对未来的前景是令人兴奋的。

英文摘要:

The dark energy problem has led to speculation that not only may LCDM be wrong, but that the FLRW models themselves may not even provide the correct family of background models. We discuss how direct measurements of H(z) can be used to formulate tests of the standard paradigm in cosmology. On their own, such measurements can be used to test for deviations from flat LCDM. When combined with supernovae distances, Hubble rate measurements provide a test of the Copernican principle and the homogeneity assumption of the standard model, which is independent of dark energy or metric based theory of gravity. A modification of this test also provides a model independent observable for flatness which decorrelates curvature determination from dark energy. We investigate these tests using Hubble rate measurements from age data, as well as from a Hubble rate inferred from recent measurements of the baryon acoustic oscillations. While the current data is too weak to say anything significant, these tests are exciting prospects for the future.

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。

↑