Abstract
The results of joint analyses of available cosmological data
have motivated an important debate about a possible detection of a
non-zero spatial curvature. If confirmed, such a result would imply
a change in our present understanding of cosmic evolution with
important theoretical and observational consequences. In this paper
we discuss the legitimacy of carrying out joint analyses with the
currently available data sets and explore their implications for a
non-flat universe and extensions of the standard cosmological model.
We use a robust tension estimator to perform a quantitative analysis
of the physical consistency between the latest data of Cosmic
Microwave Background, type Ia supernovae, Baryonic Acoustic
Oscillations and Cosmic Chronometers. We consider the flat and
non-flat cases of the ΛCDM cosmology and of two dark energy
models with a constant and varying dark energy EoS parameter. The
present study allows us to better understand if possible
inconsistencies between these data sets are significant enough to
make the results of their joint analyses misleading, as well as the
actual dependence of such results with the spatial curvature and
dark energy parameterizations. According to our results, we conclude
that a joint analysis in the context of a non-flat universe
including the CMB data is only possible if the CMB Lens is taken
into account, otherwise, it potentially leads to misleading
conclusions.