2008A&A...483...15Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.15CEST05:29:48

2008A&A...483...15Z - Astronomy and Astrophysics, volume 483, 15-18 (2008/5-3)

Testing power-law cosmology with galaxy clusters.

ZHU Z.-H., HU M., ALCANIZ J.S. and LIU Y.-X.

Abstract (from CDS):

Power-law cosmologies, in which the cosmological scale factor evolves as a power law in time, a ∝tα with α>1, regardless of the matter content or cosmological epoch, is comfortably concordant with a host of cosmological observations. In this article, we use recent measurements of the X-ray gas mass fractions in clusters of galaxies to constrain the α parameter with curvature k=±1,0. We find that the best fit happens for an open scenario with the power index α=1.14±0.05, though the flat and closed model cannot be ruled out with high confidence. Our results are in agreement with other recent analyses and show that the X-ray gas mass fraction measurements in clusters of galaxies provide a complementary test of the power-law cosmology.

Abstract Copyright:

Journal keyword(s): cosmological parameters - cosmology: theory - X-rays: galaxies: clusters

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 468 0
2 2MASX J07473129-1917403 BiC 07 47 31.296 -19 17 40.34   19.60       ~ 393 1
3 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 364 0
4 ACO 963 ClG 10 17 09.6 +39 01 00           ~ 352 0

    Equat.    Gal    SGal    Ecl

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2020.08.15-05:29:48

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