Determining the equation of state of the expanding Universe: inverse problem in cosmology

被引：110

作者：

Nakamura, T ^{[1
]}

Chiba, T

机构：

[1] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan

[2] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 306卷 / 03期

关键词：

cosmology : theory; dark matter;

D O I：

10.1046/j.1365-8711.1999.02551.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Even if the luminosity distance as a function of redshift is obtained accurately using, for example, Type la supernovae, the equation of state of the Universe cannot be determined uniquely, as it depends on one free parameter Omega(k0) = k/(a(0)(2)H(0)(2)), where a(0) and H-0 are the present scalefactor and the Hubble parameter, respectively. This degeneracy might be resolved if, for example, the time variations of the redshift of quasars are measured as proposed recently by Loeb. Therefore, the equation of state of the Universe (or the metric of the Universe) might be determined in future without any theoretical assumption on the matter content of the Universe.

引用

页码：696 / 700

页数：5

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