Constraining evolution of quintessence with CMB and SNIa data

Wolung Lee, Kin Wang Ng

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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.

Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number10
Publication statusPublished - 2003 Jan 1


ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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