w and w′ of scalar field models of dark energy

被引：103

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.

引用

页数：5