English

Constraining LTB models with JLA supernovae and BAO

Cosmology and Nongalactic Astrophysics 2016-03-17 v2

Abstract

In the present work we constrain three different profiles of a Lema\^itre-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\chi^2 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.

Cite

@article{arxiv.1512.02571,
  title  = {Constraining LTB models with JLA supernovae and BAO},
  author = {C. Z. Vargas and F. T. Falciano and R. R. R. Reis},
  journal= {arXiv preprint arXiv:1512.02571},
  year   = {2016}
}

Comments

23 pages, 12 figures, 6 tables, material and references added

R2 v1 2026-06-22T12:04:29.462Z