Ghost Stars in General Relativity

Luis Herrera; Alicia Di Prisco; Justo Ospino

doi:10.20944/preprints202404.0895.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 12 April 2024 / Approved: 15 April 2024 / Online: 15 April 2024 (09:39:07 CEST)

We explore an idea put forward many years ago by Zeldovich and Novikov concerning the existence of compact objects endowed with arbitrarily small mass. The energy-density of such objects, which we call “Ghost stars”, is negative in some regions of the fluid distribution, producing a vanishing total mass. Thus, the interior is matched on the boundary surface to Minkowski space-time. Some exact analytical solutions are exhibited and their properties are analyzed. Observational data that could confirm or dismiss the existence of this kind of stellar object, is commented.

relativistic fluids; interior solutions; spherically symmetric sources

Physical Sciences, Theoretical Physics

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Ghost Stars in General Relativity

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