Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confronting Lemaitre-Tolman-Bondi models with Observational Cosmology   The possibility that we live in a special place in the universe, close to the
centre of a large void, seems an appealing alternative to the prevailing
interpretation of the acceleration of the universe in terms of a LCDM model
with a dominant dark energy component. In this paper we confront the
asymptotically flat Lemaitre-Tolman-Bondi (LTB) models with a series of
observations, from Type Ia Supernovae to Cosmic Microwave Background and Baryon
Acoustic Oscillations data. We propose two concrete LTB models describing a
local void in which the only arbitrary functions are the radial dependence of
the matter density Omega_M and the Hubble expansion rate H. We find that all
observations can be accommodated within 1 sigma, for our models with 4 or 5
independent parameters. The best fit models have a chi^2 very close to that of
the LCDM model. We perform a simple Bayesian analysis and show that one cannot
exclude the hypothesis that we live within a large local void of an otherwise
Einstein-de Sitter model.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas