Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-06
Phys.Rev. D65 (2002) 043506
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Physical Review D
Scientific paper
10.1103/PhysRevD.65.043506
Using the Bayesian theory of model comparison, a new cosmological model due to John and Joseph [M. V. John and K. Babu Joseph, Phys. Rev. D 61, 87304 (2000)] is compared with the standard \Omega_{\Lambda} \neq 0 cosmological model. Their analysis based on the recent apparent magnitude-redshift data of Type Ia supernovas found evidence against the new model; our more careful analysis finds instead that this evidence is not strong. On the other hand, we find that the angular size-redshift data from compact (milliarcsecond) radio sources do not discriminate between the two models. Our analysis serves as an example of how to compare the relative merits of cosmological models in general, using the Bayesian approach.
John Moncy V.
Narlikar Jayant V.
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