Can mixed star-plus-wormhole systems mimic black holes?

TL;DR

This paper explores mixed star-plus-wormhole systems as potential black hole mimickers, analyzing their structure and observational signatures to distinguish them from true black holes.

Contribution

It introduces static spherically symmetric solutions of wormholes threaded by matter, proposing a new class of compact objects that can mimic black holes.

Findings

Mixed systems can produce high-redshift surfaces similar to black holes.

Observable differences in accretion disk emissions can distinguish these objects from true black holes.

The models suggest new possibilities for astrophysical compact object identification.

Abstract

We consider mixed strongly gravitating configurations consisting of a wormhole threaded by two types of ordinary matter. For such systems, the possibility of obtaining static spherically symmetric solutions describing compact massive central objects enclosed by high-redshift surfaces (black-hole-like configurations) is studied. Using the standard thin accretion disk model, we exhibit potentially observable differences allowing to distinguish the mixed systems from ordinary black holes with the same masses.