Gravitational Collapse of Null Radiation and a String fluid

TL;DR

This paper investigates the gravitational collapse of null radiation combined with a string fluid, demonstrating that under certain conditions, such collapse can lead to the formation of locally naked singularities, contrasting with other matter models.

Contribution

It introduces a model of gravitational collapse involving null radiation and string fluids, analyzing conditions for naked singularity formation without assuming asymptotic flatness.

Findings

Naked singularities can form in collapse with diffusive string fluids.

Collapse of radiation-string two-fluid can also produce naked singularities.

The model differs from strange quark matter scenarios.

Abstract

We consider the end state of collapsing null radiation with a string fluid. It is shown that, if diffusive transport is assumed for the string, that a naked singularity can form (at least locally). The model has the advantage of not being asymptotically flat. We also analyse the case of a radiation-string two-fluid and show that a locally naked singularity can result in the collapse of such matter. We contrast this model with that of strange quark matter.