Viable Singularity-Free f(R) Gravity without a Cosmological Constant

被引：73

作者：

Miranda, Vinicius ^{[1
]}

Joras, Sergio E. ^{[1
]}

Waga, Ioav ^{[1
]}

Quartin, Miguel ^{[2
,3
,4
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil

[2] INAF Osservatorio Astron Roma, Rome, Italy

[3] Univ Milano Bicocca, Dipartimento Fis G Occhialini, I-20126 Milan, Italy

[4] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 22期

关键词：

MODELS;

D O I：

10.1103/PhysRevLett.102.221101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Several authors have argued that self-consistent f(R) gravity models distinct from the cold dark matter model with a cosmological constant (Lambda CDM) are almost ruled out. Confronting such claims, we present a particular two-parameter f(R) model that (a) is cosmologically viable and distinguishable from Lambda CDM, (b) is compatible with the existence of relativistic stars, (c) is free of singularities of the Ricci scalar during the cosmological evolution, and (d) allows the addition of high-curvature corrections that could be relevant for inflation.

引用

页数：4

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