Ripped ΛCDM: an observational contender to the consensus cosmological model

Abstract

Current observations do not rule out the possibility that the Universe might end up in an abrupt event. Different such scenarios may be explored through suitable parameterizations of the dark energy and then confronted to cosmological background data. Here we parameterize a pseudorip scenario using a particular sigmoid function and carry an in-depth multifaceted examination of its evolutionary features and statistical performance. This depiction of a non violent final fate of our cosmos seems to be arguably statistically favoured over the consensus ΛCDM model according to some Bayesian discriminators.

13 pages, 5 figures (one of them animated); references, figures and subsections added