Corrected constraints on big bang nucleosynthesis in a modified gravity model of f (R) ∝ Rn

被引：12

作者：

Kusakabe, Motohiko ^{[1
,2
]}

Koh, Seoktae ^{[3
]}

Kim, K. S. ^{[1
]}

Cheoun, Myung-Ki ^{[2
]}

机构：

[1] Korea Aerosp Univ, Sch Liberal Arts & Sci, Goyang 412791, South Korea

[2] Soongsil Univ, Dept Phys, Seoul 156743, South Korea

[3] Jeju Natl Univ, Dept Sci Educ, Jeju 690756, South Korea

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

ABUNDANCE;

D O I：

10.1103/PhysRevD.91.104023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Big bang nucleosynthesis in a modified gravity model of f(R) proportional to R-n is investigated. The only free parameter of the model is a power-law index n. We find cosmological solutions in a parameter region of 1 < n <= (4 + root 6)/5. We calculate abundances of He-4, D, He-3, Li-7, and Li-6 during big bang nucleosynthesis. We compare the results with the latest observational data. It is then found that the power-law index is constrained to be (n - 1) = (-0.86 +/- 1.19) x 10(-4) (95% C.L.) mainly from observations of deuterium abundance as well as He-4 abundance.

引用

页数：7

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