Constraining Evolution of Quintessence with CMB and SNIa Data

Details Constraining Evolution of Quintessence with CMB and SNIa Data Constraining Evolution of Quintessence with CMB and SNIa Data

2002-09-05

arxiv.org/abs/astro-ph/0209093v2

Phys.Rev.D67:107302,2003

Astronomy and Astrophysics

Astrophysics

replaced with a revised paper

Scientific paper

10.1103/PhysRevD.67.107302

The equation of state of the hypothetical dark energy component, which constitutes about two thirds of the critical density of the universe, may be very different from that of a cosmological constant. Employing a phenomenological model, we investigate semi-analytically the constraints imposed on the scalar quintessence by supernovae observations, and by the acoustic scale extracted from recent CMB data. We show that a universe with a quintessence-dominated phase in the dark age is consistent with the current observational constraints.

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