Constraints on scalar-field dark energy from galaxy cluster gas mass fraction versus redshift

May, 2004
10 pages
Published in:
  • Astrophys.J.Lett. 612 (2004) L1-4
e-Print:

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Abstract: (arXiv)
We use the Allen et al. (2004) Chandra measurements of x-ray gas mass fraction of 26 rich clusters to place constraints on the scalar-field dark energy model with inverse power law potential energy density. The constraints are consistent with, and typically more constraining than, those from other cosmological tests, and mildly favor the Einstein cosmological constant limit of the dark energy model.
  • cosmological parameters
  • cosmology: observations
  • X-rays: galaxies: clusters
  • dark energy
  • field theory: scalar
  • galaxy: cluster
  • photon: cosmic radiation
  • gas: mass
  • numerical calculations: interpretation of experiments