Observational information for f (T) theories and dark torsion
Observational information for f (T) theories and dark torsion
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DOI：
10.1016/j.physletb.2010.11.064
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发表时间：
2011-01-17
影响因子：
4.4
通讯作者：
Bengochea, Gabriel R.
中科院分区：
文献类型：
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作者：
Bengochea, Gabriel R.
在目前的工作中，我们分析和比较的信息来自不同的观测数据集的一种f（T）理论的背景下。我们进行了联合分析与最近的Ia型超新星（SNe la），重子声振荡（BAO），宇宙微波背景辐射（CMB），伽玛射线暴数据（GRBs）和哈勃参数观测（OHD）的测量，以约束这些理论的唯一新参数。结果表明，当新的组合BAO/CMB参数被用来把约束，结果是不同于以往的工作。我们还表明，当我们包括观测哈勃数据（OHD）的更简单的ACDM模型被排除到一个西格玛水平，导致这些理论的有效状态方程是幻影型。此外，分析了SNe la和其他观测集的张力准则，我们获得了更一致和更适合这些理论的数据集。(C)2010 Elsevier BV保留所有权利。
In the present work we analyze and compare the information coming from different observational data sets in the context of a sort of f (T) theories. We perform a joint analysis with measurements of the most recent type la supernovae (SNe la), Baryon Acoustic Oscillation (BAO), Cosmic Microwave Background radiation (CMB), Gamma-Ray Bursts data (GRBs) and Hubble parameter observations (OHD) to constraint the only new parameter these theories have. It is shown that when the new combined BAO/CMB parameter is used to put constraints, the result is different from previous works. We also show that when we include Observational Hubble Data (OHD) the simpler ACDM model is excluded to one sigma level, leading the effective equation of state of these theories to be of phantom type. Also, analyzing a tension criterion for SNe la and other observational sets, we obtain more consistent and better suited data sets to work with these theories. (C) 2010 Elsevier B.V. All rights reserved.