Constraints on a new alternative model to dark energy

The recent type Ia supernova data suggest that the universe is accelerating now and decelerated in recent past. This may provide the evidence that the standard Friedmann equation needs to be modified. We analyze in detail a new model in the context of modified Friedmann equation using the supernova...

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Bibliographic Details
Published in:arXiv.org 2004-11
Main Authors: Gong, Yungui, Xi-Ming, Chen
Format: Article
Language:English
Subjects:
Acceleration
Constraint modelling
Cosmology
Dark energy
Deceleration
Supernovae
Universe
Online Access:Get full text
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Summary:The recent type Ia supernova data suggest that the universe is accelerating now and decelerated in recent past. This may provide the evidence that the standard Friedmann equation needs to be modified. We analyze in detail a new model in the context of modified Friedmann equation using the supernova data published by the High-\(z\) Supernova Search Team and the Supernova Cosmology Project. The new model explains recent acceleration and past deceleration. Furthermore, the new model also gives a decelerated universe in the future.
ISSN:2331-8422
DOI:10.48550/arxiv.0402031