Averaging inhomogeneities in scalar-tensor cosmology

被引：6
|
作者：
Vitagliano, Vincenzo [1 ,2 ]
Liberati, Stefano [1 ,2 ]
Faraoni, Valerio [3 ]
机构：
[1] SISSA Int Sch Adv Studies, I-34151 Trieste, Italy
[2] Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy
[3] Bishops Univ, Dept Phys, Sherbrooke, PQ J1M 1Z7, Canada
来源：
CLASSICAL AND QUANTUM GRAVITY | 2009年 / 26卷 / 21期
基金：
加拿大自然科学与工程研究理事会;
关键词：
HIGH-REDSHIFT SUPERNOVAE; GENERAL-RELATIVITY; DARK ENERGY; ACCELERATING UNIVERSE; COSMIC ACCELERATION; GRAVITY; CONSTRAINTS; PRINCIPLE;
D O I：
10.1088/0264-9381/26/21/215005
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The backreaction of inhomogeneities on the cosmic dynamics is studied in the context of scalar-tensor gravity. Due to terms of indefinite sign in the non-canonical effective energy tensor of the Brans-Dicke-like scalar field, extra contributions to the cosmic acceleration can arise. Brans-Dicke and metric f(R) gravity are presented as specific examples. Certain representation problems of the formalism peculiar to these theories are pointed out.
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收藏
页数：12
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