Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-11-09
Phys.Rev. D58 (1998) 123504
Astronomy and Astrophysics
Astrophysics
12 pages, 3 figures, Revtex. To appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.58.123504
We investigate the possibility that the matter of the universe has a significant component (the quintessence component) determined by the equation of state $p=w\rho$, with $w<0$. Here, we find conditions under which a closed model may look like a flat Friedmann-Robertson-Walker universe at low redshift. We study this problem in Einstein's general relativity and Brans-Dicke theories. In both cases we obtain explicit expressions for the quintessence scalar potential $V(Q)$, and the angular size as a function of the redshift.
Cruz Norman
del Campo Sergio
Herrera Ramon
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