Constraining the dark-energy equation of state with cosmological data

Yu Ping Teng, Wolung Lee, Kin Wang Ng

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Recently, the observed equation of state for dark energy appears to favor values below -1. The tendency implies that the nature of dark energy may be quite different from that of the cosmological constant. In view of the adjustment on the equation of state keeps decreasing, the introduction of the phantom energy seems inevitable. By employing observational constraints from supernovae and from the acoustic scale in which the accuracy of the data has become extraordinary, we apply a phenomenological scenario to be acquainted with the evolution of our universe. The demonstration on the constrained unfolding of the phantom energy shows the model has high consistency with the current observation.

Original languageEnglish
Article numberA24
JournalPhysical Review D
Volume104
Issue number8
DOIs
Publication statusPublished - 2021 Oct 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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