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 semianalytically the constraints imposed on the scalar quintessence by supernovae observations, and by the acoustic scale extracted from recent cosmic microwave background data. We show that a universe with a quintessence-dominated phase in the dark age is consistent with the current observational constraints.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 2003|
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)