Abstract
Abstract
In this paper we introduce a new public Einstein-Boltzmann
solver, MGCLASS II, built as a modification of the publicly
available CLASS code, that allows to obtain cosmological
observables in Modified Gravity theories. It implements several
commonly used parameterizations of deviations from General
Relativity, computing their impact on the growth of structure as
well as on the background evolution of the Universe, together with a
subset of available alternative theories, still not completely ruled
out by observations. MGCLASS II is built in such a way to
be compatible with parameter estimation codes such as
MontePython and Cobaya. We exploit this
possibility to constrain the parameterizations used by the Planck
collaboration, in order to validate the predictions of this new
code, and a newly implemented parameterization (z_flex) which has
different features. For the former we find good agreement with the
results existing in the literature, while we present original
constraints on the parameters of the latter, finding no significant
deviation from the standard cosmological model, ΛCDM.
Subject
Astronomy and Astrophysics
Cited by
21 articles.
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