@Article{AlvesCarAraPenVit:2018:CoCoCo,
author = "Alves, M{\'a}rcio E. S. and Carvalho, F{\'a}bio C. and
Ara{\'u}jo, Jos{\'e} Carlos Neves de and Penna-Lima, Mariana and
Vitenti, Sandro D. P.",
affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universidade
Estadual do Rio Grande do Norte (UERN)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universit{\'e} de Savoie}",
title = "Cosmological constant constraints from observation-derived energy
condition bounds and their application to bimetric massive
gravity",
journal = "European Physical Journal C",
year = "2018",
volume = "78",
number = "710",
abstract = "Among the various possibilities to probe the theory behind the
recent accelerated expansion of the universe, the energy
conditions (ECs) are of particular interest, since it is possible
to confront and constrain the many models, including different
theories of gravity, with observational data. In this context, we
use the ECs to probe any alternative theory whose extra term acts
as a cosmological constant. For this purpose, we apply a
modelindependent approach to reconstruct the recent expansion of
the universe. Using Type Ia supernova, baryon acoustic
oscillations and cosmic-chronometer data, we perform a Markov
Chain Monte Carlo analysis to put constraints on the effective
cosmological constant \Ω0. By imposing that the
cosmological constant is the only component that possibly violates
the ECs, we derive lower and upper bounds for its value. For
instance, we obtain that 0.59 < \Ω0 < 0.91 and 0.40 <
\Ω0 < 0.93 within, respectively, 1\σ and 3\σ
confidence levels. In addition, about 30% of the posterior
distribution is incompatible with a cosmological constant, showing
that this method can potentially rule it out as a mechanism for
the accelerated expansion. We also study the consequence of these
constraints for two particular formulations of the bimetric
massive gravity. Namely, we consider the Vissers theory and the
Hassan and Rosess massive gravity by choosing a background metric
such that both theories mimic General Relativity with a
cosmological constant. Using the \Ω0 observational bounds
along with the upper bounds on the graviton mass we obtain
constraints on the parameter spaces of both theories.",
doi = "10.1140/epjc/s10052-018-6190-5",
url = "http://dx.doi.org/10.1140/epjc/s10052-018-6190-5",
issn = "1434-6044",
language = "en",
targetfile = "alves_cosmological.pdf",
urlaccessdate = "27 abr. 2024"
}