Lookback time and Chandra constrains on cosmological parameters

Details Lookback time and Chandra constrains on cosmological parameters Lookback time and Chandra constrains on cosmological parameters

2011-07-25

arxiv.org/abs/1107.4867v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 2 figures; Romanian Reports in Physics, Volume 63, Number 3, 2011

Scientific paper

In this paper we combine the WMAP7 with lookback time and Chandra gas fraction data to constrain the main cosmological parameters and the equation of state for the dark energy. We find that the lookback time is a good measurement that can improve the determination of the equation of state for the dark energy with regard to other external data sets. We conclude that larger lookback time data set will further improve our determination of the cosmological parameters.

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