Is the cosmological dark sector better modeled by a generalized Chaplygin gas or by a scalar field?

被引：1

作者：

del Campo, Sergio ^{[1
]}

Fabris, Julio C. ^{[2
,3
]}

Herrera, Ramon ^{[1
]}

Zimdahl, Winfried ^{[2
]}

机构：

[1] Pontificia Univ Catolica Valparaiso, Inst Fis, Ave Brasil 2950,Casilla 4059, Valparaiso, Chile

[2] Univ Fed Espirito Santo, Dept Fis, Ave Fernando Ferrari 514,Campus Goiabeiras, BR-29075910 Vitoria, ES, Brazil

[3] Natl Res Nucl Univ MEPhI, Kashirskoe Sh 31, Moscow 115409, Russia

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 07期

关键词：

UNIVERSE; ENERGY; CONSTRAINTS;

D O I：

10.1140/epjc/s10052-017-5051-y

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Both scalar fields and (generalized) Chaplygin gases have been widely used separately to characterize the dark sector of the universe. Here we investigate the cosmological background dynamics for a mixture of both these components and quantify the fractional abundances that are admitted by observational data from supernovae of type Ia and from the evolution of the Hubble rate. Moreover, we study how the growth rate of (baryonic) matter perturbations is affected by the dark-sector perturbations.

引用

页数：10

共 50 条

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Sergio del Campo
Júlio C. Fabris
Ramón Herrera
Winfried Zimdahl
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