Observational Constraints on Visser's Cosmological Model - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




Observational Constraints on Visser's Cosmological Model - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Theories of gravity for which gravitons can be treated as massive particleshave presently been studied as realistic modifications of General Relativity,and can be tested with cosmological observations. In this work, we study theability of a recently proposed theory with massive gravitons, the so-calledVisser theory, to explain the measurements of luminosity distance from theUnion2 compilation, the most recent Type-Ia Supernovae SNe Ia dataset,adopting the current ratio of the total density of non-relativistic matter tothe critical density $\Omega m$ as a free parameter. We also combine the SNeIa data with constraints from Baryon Acoustic Oscillations BAO and CMBmeasurements. We find that, for the allowed interval of values for $\Omega m$,a model based on Visser-s theory can produce an accelerated expansion periodwithout any dark energy component, but the combined analysis SNe Ia + BAO +CMB shows that the model is disfavored when compared with $\Lambda$CDM model.



Autor: Marcio E.S. Alves, Fabio C. Carvalho, Jose C.N. de Araujo, Oswaldo D. Miranda, Carlos A. Wuensche, Edivaldo M. Santos

Fuente: https://arxiv.org/



DESCARGAR PDF




Documentos relacionados