Cosmological tests of sudden future singularities

TL;DR

This paper evaluates how current cosmological observations constrain models with sudden future singularities, showing they could occur soon and resemble dark energy effects.

Contribution

It provides the first combined observational constraints on cosmological models with sudden future singularities using multiple data sets.

Findings

Sudden singularities may occur in the near future.

Such singularities can mimic dark energy models.

Current data do not exclude these singularities.

Abstract

We discuss combined constraints, coming from the cosmic microwave background shift parameter $\mathcal{R}$, baryon acoustic oscillations (BAO) distance parameter $\mathcal{A}$, and from the latest type Ia supernovae data, imposed on cosmological models which allow sudden future singularities of pressure. We show that due to their weakness such sudden singularities may happen in the very near future and that at present they can mimic standard dark energy models.