Constraints from Type Ia supernovae on the Λ-CDM model in Randers-Finsler space

Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann equation and a new luminosity distance-redshift relation is proposed. A best-fit to the Type Ia supernovae （SNe） observations yields that the Λ in the Λ-CDM model is suppressed t...

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Bibliographic Details
Published inChinese physics C Vol. 36; no. 8; pp. 710 - 715
Main Author 常哲 李明华 李昕
Format Journal Article
LanguageEnglish
Published 01.08.2012
Subjects
DM模型
Finsler空间
Ia型超新星
兰德斯
天文观测
宇宙年龄
引力场方程
弗里德曼
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ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/36/8/005

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Summary:Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann equation and a new luminosity distance-redshift relation is proposed. A best-fit to the Type Ia supernovae （SNe） observations yields that the Λ in the Λ-CDM model is suppressed to almost zero. This fact indicates that the astronomical observations on the Type Ia SNe can be described well without invoking any form of dark energy. The best-fit age of the universe is given. It is in agreement with the age of our galaxy.
Bibliography:11-5641/O4
Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann equation and a new luminosity distance-redshift relation is proposed. A best-fit to the Type Ia supernovae （SNe） observations yields that the Λ in the Λ-CDM model is suppressed to almost zero. This fact indicates that the astronomical observations on the Type Ia SNe can be described well without invoking any form of dark energy. The best-fit age of the universe is given. It is in agreement with the age of our galaxy.
dark energy, Finsler geometry, Type Ia supernovae, luminosity distance-redshift relation
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/8/005