Ripped {\Lambda}CDM: an observational contender to the consensus cosmological model

TL;DR

This paper explores a pseudorip dark energy scenario using a sigmoid function, showing it may be statistically favored over the standard { extLambda}CDM model in explaining the universe's potential abrupt end.

Contribution

It introduces a novel sigmoid parameterization of dark energy to model a pseudorip scenario and compares its statistical performance to the { extLambda}CDM model.

Findings

Pseudorip scenario fits cosmological data well

Statistically favored over { extLambda}CDM in some Bayesian analyses

Provides an alternative end-of-universe 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 {\Lambda}CDM model according to some Bayesian discriminators.