Vacuum Energy and Primordial Black Holes in Brans-Dicke Theory

被引：2
|
作者：
Dwivedee, D. [1 ]
Nayak, B. [1 ]
Singh, L. P. [1 ]
机构：
[1] Utkal Univ, Dept Phys, Bhubaneswar 751004, Orissa, India
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2015年 / 54卷 / 07期
关键词：
Brans-Dicke theory; Primordial black holes; Vacuum energy; GENERALIZED 2ND LAW; EXTENDED INFLATION; EVOLUTION; THERMODYNAMICS; BARYOGENESIS; RELATIVITY; ACCRETION; UNIVERSE; GRAVITY;
D O I：
10.1007/s10773-014-2454-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In our work, we study the evolution of primordial black holes within the context of Brans-Dicke theory by assuming present universe as vacuum dominated. We also consider the accretion of radiation, matter and vacuum energy only during respective dominant periods. From our study, we found that the accretion rate is slower in both radiation and vacuum energy dominated eras in Brans-Dicke theory in comparision with General Theory of Relativity [1]. Thus the PBHs evaporate at a faster rate in Brans-Dicke theory than Standard Cosmology [1], if we consider the presence of vacuum energy in both cases. We also find that vacuum energy accretion efficiency should be less than 0.61.
引用
收藏
页码：2321 / 2333
页数：13
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