Transient and late time attractor tachyon dark energy: Can we distinguish it from quintessence?

被引：29

作者：

Ali, Amna ^{[1
]}

Sami, M. ^{[1
]}

Sen, A. A. ^{[1
]}

机构：

[1] Jamia Millia Islamia, Ctr Theoret Phys, New Delhi 110025, India

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 12期

关键词：

COSMOLOGICAL CONSTANT; DYNAMICS; COINCIDENCE; UNIVERSE; FIELD;

D O I：

10.1103/PhysRevD.79.123501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The string inspired tachyon field can serve as a candidate of dark energy. Its equation of state parameter w varies from 0 to -1. In the case of tachyon field potential V(phi) -> 0 slower (faster) than 1/phi(2) at infinity, dark energy (dark matter) is a late time attractor. We investigate the tachyon dark energy models under the assumption that w is close to -1. We find that all the models exhibit unique behavior around the present epoch which is exactly the same as that of the thawing quintessence.

引用

页数：7

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