Lookback time and Chandra constrains on cosmological parameters
D. Tonoiu, A.Caramete, L.A. Popa
TL;DR
This study combines WMAP7, lookback time, and Chandra data to refine constraints on cosmological parameters and dark energy's equation of state, highlighting the value of lookback time measurements.
Contribution
It demonstrates that lookback time data significantly enhances the precision of dark energy parameter estimates when combined with other cosmological data.
Findings
Lookback time improves dark energy equation of state constraints.
Combining data sets refines cosmological parameter estimates.
Larger lookback time data sets will further improve results.
Abstract
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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Taxonomy
TopicsCosmology and Gravitation Theories · Galaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research