Reconstructing the cosmic equation of state from supernova distances

被引：355

作者：

Saini, TD ^{[1
]}

Raychaudhury, S

Sahni, V

Starobinsky, AA

机构：

[1] Inter Univ Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

[2] LD Landau Theoret Phys Inst, Moscow 117334, Russia

[3] MPI Astrophys, D-86740 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.85.1162

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Observations of high-redshift supernovae indicate that the Universe is accelerating. Here we present a model-independent method for estimating the form of the potential V(phi) of the scalar field driving this acceleration, and the associated equation of state w(phi). Our method is based on a Versatile analytical form for the luminosity distance D-L, optimized to fit observed distances to distant supernovae and differentiated to yield V(phi) and w(phi). Our results favor w(phi) similar or equal to -1 at the present epoch, steadily increasing with redshift. A cosmological constant is consistent with our results.

引用

页码：1162 / 1165

页数：4

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