2015/12/08 by C. Z. Vargas, Cristofher Zuñiga Vargas, Vargas, C. Z. +5
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #Gamma-ray bursts and supernovae #Geophysics and Gravity Measurements #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1512.02571
23 pages, 12 figures, 6 tables, material and references added
arxiv created 2016/03/16 · arxiv updated 2016/03/17
In the present work we constrain three different profiles of a Lemaître-Tolman-Bondi model using supernovae type Ia and baryon acoustic oscillation data. We improve common practice in the literature by carefully calibrating the supernovae in the appropriate inhomogeneous background dynamics. In addition, we address subtle issues in order to propagate the primordial BAO scale to present epoch. The combined analysis of BAO+SNIa offers a stringent test for these models. We use two distinct parameter estimation approaches, namely, the χ2 and the complete likelihood functional. It has been argued that these two approaches are not equivalent and indeed our analysis shows a specific example of their departure.