Astrophysical Tests of Kinematical Conformal Cosmology in Fourth-Order Conformal Weyl GravityReportar como inadecuado




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Department of Physics, Loyola Marymount University, Los Angeles, CA 90045, USA





Abstract In this work we analyze kinematical conformal cosmology KCC, an alternative cosmological model based on conformal Weyl gravity CG, and test it against current type Ia supernova SNIa luminosity data and other astrophysical observations. Expanding upon previous work on the subject, we revise the analysis of SNIa data, confirming that KCC can explain the evidence for an accelerating expansion of the Universe without using dark energy or other exotic components. We obtain an independent evaluation of the Hubble constant, H0 = 67:53 kms-1 Mpc-1, very close to the current best estimates. The main KCC and CG parameters are re-evaluated and their revised values are found to be close to previous estimates. We also show that available data for the Hubble parameter as a function of redshift can be fitted using KCC and that this model does not suffer from any apparent age problem. Overall, View Full-Text

Keywords: modified theories of gravity; conformal gravity; conformal cosmology; type Ia supernovae; standard candles; cosmic chronometers modified theories of gravity; conformal gravity; conformal cosmology; type Ia supernovae; standard candles; cosmic chronometers





Autor: Gabriele U. Varieschi

Fuente: http://mdpi.com/



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