Constraints on Scalar-Field Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift Data | Zendy

Gang Chen | Zendy; Bharat Ratra | Zendy

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Constraints on Scalar-Field Dark Energy from Galaxy Cluster Gas Mass Fraction versus Redshift Data

Author(s) -

Gang Chen,

Bharat Ratra

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/424037

Subject(s) - dark energy , physics , astrophysics , scalar field , cosmological constant , dark fluid , redshift , galaxy , galaxy cluster , quintessence , dark matter , lambda cdm model , cosmology , theoretical physics , mathematical physics

We use the Allen et al. (2004) Chandra measurements of x-ray gas massfraction of 26 rich clusters to place constraints on the scalar-field darkenergy model with inverse power law potential energy density. The constraintsare consistent with, and typically more constraining than, those from othercosmological tests, and mildly favor the Einstein cosmological constant limitof the dark energy model.Comment: 10 pages, 3 figures, Version accepted by ApJL, with minor revisions and new reference

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