arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.07952astro-ph.COgr-qc
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大爆炸核合成对f(T)遥平行引力的约束

Constraining f(T) teleparallel gravity by Big Bang Nucleosynthesis

S. Capozziello, G. Lambiase, E. N. Saridakis

摘要:

我们使用BBN观测数据的原始丰度${}^4He$约束f(T)重力。三个最研究可行的$f(T)$模型,即幂律,指数和平方根指数被认为是,和BBN界被采用,以提取其自由参数的约束。对于幂律模型,我们发现,这些约束是在协议中使用晚时间的宇宙学数据。对于指数和平方根指数模型,我们证明了参数空间的可靠区域总是满足BBN界。我们得出结论,可行的f(T)模型可以成功地满足BBN约束。

英文摘要:

We use BBN observational data on primordial abundance of ${}^4He$ to constrain f(T) gravity. The three most studied viable $f(T)$ models, namely the power law, the exponential and the square-root exponential are considered, and the BBN bounds are adopted in order to extract constraints on their free parameters. For the power-law model, we find that the constraints are in agreement with those acquired using late-time cosmological data. For the exponential and the square-root exponential models, we show that for realiable regions of parameters space they always satisfy the BBN bounds. We conclude that viable f(T) models can successfully satisfy the BBN constraints.

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