Model independent tests of the standard cosmological model
Model independent tests of the standard cosmological model
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DOI：
10.1103/physrevd.81.083537
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发表时间：
2009-11
影响因子：
5
通讯作者：
A. Shafieloo;C. Clarkson
中科院分区：
文献类型：
--
作者：
A. Shafieloo;C. Clarkson
暗能量的问题已经引起了这样的猜测，不仅可能$\ensuremath{\Lambda}\mathrm{CDM}$是错误的，而且Friedmann-Lema\^{\i}tre-Robertson-步行者模型本身甚至可能不能提供正确的背景模型族。我们讨论了如何直接测量的$H（z）$可用于制定测试的标准范式在宇宙学。这些测量值本身可用于测试与平面$\ensuremath{\Lambda}\mathrm{CDM}$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，标准模型独立于暗能量或基于引力理论的度量。这个测试的修改还提供了一个模型独立的可观察的平坦度，从暗能量去相关的曲率确定。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重子声振荡。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。
The dark energy problem has led to speculation that not only may $\ensuremath{\Lambda}\mathrm{CDM}$ be wrong, but that the Friedmann-Lema\^{\i}tre-Robertson-Walker 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 $\ensuremath{\Lambda}\mathrm{CDM}$. 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 a metric based the 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 are too weak to say anything significant, these tests are exciting prospects for the future.