Dieterici gas as a Unified Model for Dark Matter and Dark Energy

Details Dieterici gas as a Unified Model for Dark Matter and Dark Energy Dieterici gas as a Unified Model for Dark Matter and Dark Energy

2011-02-08

arxiv.org/abs/1102.1598v1

Astrophys.Space Sci.335:599-602,2011

Physics

General Physics

9 pages, 38 equations

Scientific paper

10.1007/s10509-011-0770-2

The dominance of dark energy in the universe has necessitated the introduction of a repulsive gravity source to make q0 negative. The models for dark energy range from a simple lambda-term to quintessence, Chaplygin gas, etc. We look at the possibility of how change of behaviour of missing energy density, from DM to DE, may be determined by the change in the equation of state of a background fluid instead of a form of potential. The question of cosmic acceleration can be discussed within the framework of theories which do not necessarily include scalar fields.

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