How many dark energy parameters?

被引：128

作者：

Linder, EV ^{[1
]}

Huterer, D

机构：

[1] Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA

[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[3] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW D | 2005年 / 72卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.72.043509

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

For exploring the physics behind the accelerating Universe a crucial question is how much we can learn about the dynamics through next generation cosmological experiments. For example, in defining the dark energy behavior through an effective equation of state, how many parameters can we realistically expect to tightly constrain? Through both general and specific examples (including new parametrizations and principal component analysis) we argue that the answer is two. Cosmological parameter analyses involving a measure of the equation of state value at some epoch (e.g. w(0)) and a measure of the change in equation of state (e.g. w(')) are therefore realistic in projecting dark energy parameter constraints. More elaborate parametrizations could have some uses (e.g. testing for bias or comparison with model features), but do not lead to accurately measured dark energy parameters.

引用

页码：1 / 10

页数：10

共 33 条

[11] Effects of the sound speed of quintessence on the microwave background and large scale structure [J].

DeDeo, S ;

Caldwell, RR ;

Steinhardt, PJ .

PHYSICAL REVIEW D, 2003, 67 (10)

[12] Power spectra for cold dark matter and its variants [J].

Eisenstein, DJ ;

Hu, W .

ASTROPHYSICAL JOURNAL, 1999, 511 (01) :5-15

[13] Cosmic complementarity: Joint parameter estimation from cosmic microwave background experiments and redshift surveys [J].

Eisenstein, DJ ;

Hu, W ;

Tegmark, M .

ASTROPHYSICAL JOURNAL, 1999, 518 (01) :2-23

[14] Probing dark energy with supernovae: Exploiting complementarity with the cosmic microwave background [J].

Frieman, JA ;

Huterer, D ;

Linder, EV ;

Turner, MS .

PHYSICAL REVIEW D, 2003, 67 (08)

[15] Constraints on the sound speed of dark energy [J].

Hannestad, S .

PHYSICAL REVIEW D, 2005, 71 (10)

[16] Structure formation with generalized dark matter [J].

Hu, W .

ASTROPHYSICAL JOURNAL, 1998, 506 (02) :485-494

[17] Parametrization of dark-energy properties: A principal-component approach [J].

Huterer, D ;

Starkman, G .

PHYSICAL REVIEW LETTERS, 2003, 90 (03) :4-031301

[18] Probing dark energy: Methods and strategies [J].

Huterer, D ;

Turner, MS .

PHYSICAL REVIEW D, 2001, 64 (12)

[19]

HUTERER D, ASTROPH0506030

[20]

KNOX L, ASTROPH0503644

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