Can luminosity distance measurements probe the equation of state of dark energy?

被引：84

作者：

Astier, P

机构：

[1] Univ Paris 06, CNRS, IN2P3, LPNHE, F-75252 Paris 05, France

[2] Univ Paris 07, CNRS, IN2P3, LPNHE, F-75252 Paris, France

来源：

PHYSICS LETTERS B | 2001年 / 500卷 / 1-2期

关键词：

cosmology; dark energy; luminosity distance; type Ia supernovae;

D O I：

10.1016/S0370-2693(01)00072-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Distance measurements to type Ia supernovae (SNe Ia) at cosmological distances indicate that the Universe is accelerating and that a large fraction of the critical energy density exists in a component with negative pressure. Various hypotheses on the nature of this "dark energy" can be tested via their prediction for the equation of state of this component. If the dark energy is due to a scalar field, its equation of state will in general vary with time and is related to the potential of the held. We review the intrinsic degeneracies of luminosity distance measurements and compute the expected accuracies that can be obtained for the equation of state parameter from a realistic high statistic SNe Ia experiment. (C) 2001 Published by Elsevier Science B.V.

引用

页码：8 / 15

页数：8

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