Power-law solution for anisotropic universe in f(G) gravity

被引：23

作者：

Fayaz, V. ^{[1
]}

Hossienkhani, H. ^{[1
]}

Aghamohammadi, A. ^{[2
]}

机构：

[1] Islamic Azad Univ, Hamedan Branch, Dept Phys, Hamadan, Iran

[2] Islamic Azad Univ, Sanandaj Branch, Sanandaj, Iran

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2015年 / 357卷 / 02期

关键词：

Anisotropic Universe; Phantom phase; f(G) gravity; COSMOLOGICAL CONSTANT; DARK ENERGY; F(R; T); GRAVITY; PERFECT FLUID; MODELS; CONSEQUENCES; COMPONENT; EQUATION; LAMBDA;

D O I：

10.1007/s10509-015-2367-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We try to study the theory of modified Gauss-Bonnet gravity in non-isotope universe. It is considered the exact power-law solution in modified gravity models. A f(G) function corresponding with power law solutions for given scale factor are calculated. We show that BI-like power-law solutions only exist for a very special class of f(G) theories. It is shown that transition to phantom phase is happened by applied some bound on free parameters. We also explore the stability issue of modified gravitational models.

引用

页数：9

共 51 条

[1] Dark energy dominance and cosmic acceleration in first-order formalism [J].

Allemandi, G ;

Borowiec, A ;

Francaviglia, M ;

Odintsov, SD .

PHYSICAL REVIEW D, 2005, 72 (06)

[2] Anisotropic universe with anisotropic sources [J].

Aluri, Pavan K. ;

Panda, Sukanta ;

Sharma, Manabendra ;

Thakur, Snigdha .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2013, (12)

[3] Dynamical solution to the problem of a small cosmological constant and late-time cosmic acceleration [J].

Armendariz-Picon, C ;

Mukhanov, V ;

Steinhardt, PJ .

PHYSICAL REVIEW LETTERS, 2000, 85 (21) :4438-4441

[4] A phantom menace? Cosmological consequences of a dark energy component with super-negative equation of state [J].

Caldwell, RR .

PHYSICS LETTERS B, 2002, 545 (1-2) :23-29

[5] Cosmological imprint of an energy component with general equation of state [J].

Caldwell, RR ;

Dave, R ;

Steinhardt, PJ .

PHYSICAL REVIEW LETTERS, 1998, 80 (08) :1582-1585

[6] Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase [J].

Capozziello, S. ;

Nojiri, S. ;

Odintsov, S. D. ;

Troisi, A. .

PHYSICS LETTERS B, 2006, 639 (3-4) :135-143

[7] The Cosmological Constant [J].

Carroll S.M. .

Living Reviews in Relativity, 2001, 4 (1)

[8] Cosmology of generalized modified gravity models - art. no. 065313 [J].

Carroll, SM ;

De Felice, A ;

Duvvuri, V ;

Easson, DA ;

Trodden, M ;

Turner, MS .

PHYSICAL REVIEW D, 2005, 71 (06) :1-11

[9] Solar System constraints to general f(R) gravity [J].

Chiba, Takeshi ;

Smith, Tristan L. ;

Erickcek, Adrienne L. .

PHYSICAL REVIEW D, 2007, 75 (12)

[10] Dark energy in modified Gauss-Bonnet gravity: Late-time acceleration and the hierarchy problem [J].

Cognola, G ;

Elizalde, E ;

Nojiri, S ;

Odintsov, SD ;

Zerbini, S .

PHYSICAL REVIEW D, 2006, 73 (08)

← 1 2 3 4 5 6 →