Linear growth in power law f(T) gravity

被引：44
|
作者：
Basilakos, Spyros [1 ]
机构：
[1] Acad Athens, Res Ctr Astron & Appl Math, Soranou Efesiou 4, Athens 11527, Greece
来源：
PHYSICAL REVIEW D | 2016年 / 93卷 / 08期
关键词：
DARK-ENERGY CONSTRAINTS; INDEX; MODEL;
D O I：
10.1103/PhysRevD.93.083007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We provide for the first time the growth index of linear matter fluctuations of the power law f (T) proportional to (-T)(b) gravity model. We find that the asymptotic form of this particular f (T) model is gamma approximate to 6/11-6b, which obviously extends that of the ACDM model, gamma(A) approximate to 6/11. Finally, we generalize the growth index analysis of f (T) gravity in the case where gamma is allowed to vary with redshift.
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页数：8
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