w and w′ of scalar field models of dark energy

被引：110

作者：

Chiba, T ^{[1
]}

机构：

[1] Nihon Univ, Coll Humanities & Sci, Dept Phys, Tokyo 1568550, Japan

[2] Natl Astron Observ Japan, Div Theoret Astron, Tokyo 1818588, Japan

来源：

PHYSICAL REVIEW D | 2006年 / 73卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.73.063501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Important observables to reveal the nature of dark energy are the equation of state w and its time derivative in units of the Hubble time w'. Recently, it was shown that the simplest scalar field models of dark energy (quintessence) occupy rather narrow regions in the w-w(') plane. We extend the w-w' plane to w <-1 and derive bounds on w' as a function of w for tracker phantom dark energy. We also derive bounds on tracker k-essence. The observational window for w' for w <-1 is not narrow, sigma(w') less than or similar to 6 vertical bar 1+w vertical bar.

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页数：5

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共 22 条

[1] 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

[2] k-Inflation [J].

Armendáriz-Picón, C ;

Damour, T ;

Mukhanov, V .

PHYSICS LETTERS B, 1999, 458 (2-3) :209-218

[3] Probing dark energy perturbations:: The dark energy equation of state and speed of sound as measured by WMAP -: art. no. 083503 [J].

Bean, R ;

Doré, O .

PHYSICAL REVIEW D, 2004, 69 (08) :8

[4] Limits of quintessence [J].

Caldwell, RR ;

Linder, EV .

PHYSICAL REVIEW LETTERS, 2005, 95 (14)

[5] 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

[6] Phantom energy:: Dark energy with w<-1 causes a cosmic doomsday -: art. no. 071301 [J].

Caldwell, RR ;

Kamionkowski, M ;

Weinberg, NN .

PHYSICAL REVIEW LETTERS, 2003, 91 (07)

[7] Can the dark energy equation-of-state parameter w be less than-1? -: art. no. 023509 [J].

Carroll, SM ;

Hoffman, M ;

Trodden, M .

PHYSICAL REVIEW D, 2003, 68 (02)

[8] Kinetically driven quintessence [J].

Chiba, T ;

Okabe, T ;

Yamaguchi, M .

PHYSICAL REVIEW D, 2000, 62 (02) :8

[9] Classifying the future of universes with dark energy [J].

Chiba, T ;

Takahashi, R ;

Sugiyama, N .

CLASSICAL AND QUANTUM GRAVITY, 2005, 22 (17) :3745-3758

[10] Tracking k-essence -: art. no. 063514 [J].

Chiba, T .

PHYSICAL REVIEW D, 2002, 66 (06)