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2010

Confronting General Relativity with Further Cosmological Data

Daniel, Scott F., Linder, Eric V.

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Deviations from general relativity in order to explain cosmic acceleration generically have both time and scale dependent signatures in cosmological data.

We extend our previous work by investigating model independent gravitational deviations in bins of redshift and length scale, by incorporating further cosmological probes such as temperature-galaxy and galaxy-galaxy cross-correlations, and by examining correlations between deviations.
Markov Chain Monte Carlo likelihood analysis of the model independent parameters fitting current data indicates that at low redshift general relativity deviates from the best fit at the 99% confidence level.
We trace this to two different properties of the CFHTLS weak lensing data set and demonstrate that COSMOS weak lensing data does not show such deviation.

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