Acceleration of the universe with a simple trigonometric potential

Details Acceleration of the universe with a simple trigonometric potential Acceleration of the universe with a simple trigonometric potential

2005-05-06

arxiv.org/abs/astro-ph/0505121v1

Gen.Rel.Grav. 37 (2005) 1695-1703

Astronomy and Astrophysics

Astrophysics

9 pages; 5 figures; to be published in GRG Journal

Scientific paper

10.1007/s10714-005-0152-6

In this paper we investigate the quintessence model with a minimally coupled scalar field in the context of recent supernovae observations. By choosing a particular form of the deceleration parameter q, which gives an early deceleration and late time acceleration for dust dominated model, we show that this sign flip in q can be obtained by a simple trigonometric patential. The early matter dominated model expands with q=1/2 as desired and enters a negative q phase quite late during the evolution.

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