Cosmic slowing down of acceleration using f gas

We investigate the recent - low-redshift - expansion history of the universe using the most recent observational data. Using only data from 42 measurements of f gas from Allen et al. in clusters, we found that cosmic acceleration could have already peaked and we are witnessing now its slowing down....

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2013, Vol.433 (4), p.3534-3538
Main Authors: Cárdenas, Víctor H., Bernal, Carla, Bonilla, Alexander
Format: Article
Language:English
Online Access:Request full text
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Summary:We investigate the recent - low-redshift - expansion history of the universe using the most recent observational data. Using only data from 42 measurements of f gas from Allen et al. in clusters, we found that cosmic acceleration could have already peaked and we are witnessing now its slowing down. This effect, found previously by Shafieloo, Sahni and Starobinsky in 2010 using supernova data (at that time the Constitution supernovae Type Ia sample) appears again using an independent observational probe. We also discuss the result using the most recent Union 2.1 data set.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stt983