The essential singularity in Einstein's gravity can be avoidable if the preconditions of
Penrose's theorem can be bypassed, ie, if the strong energy condition is broken in the …

Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

Abstract The Event Horizon Telescope (EHT) Collaboration recently published the first
images of the supermassive black holes in the cores of the Messier 87 and Milky Way …

Black-bounce to traversable wormhole Page 1 Journal of Cosmology and Astroparticle
Physics Black-bounce to traversable wormhole To cite this article: Alex Simpson and Matt …

We develop a number of novel “black-bounce” spacetimes. These are specific regular black
holes where the area radius always remains nonzero, thereby leading to a “throat” that is …

Given the recent development of rotating black-bounce-Kerr spacetimes, for both theoretical
and observational purposes it becomes interesting to see whether it might be possible to …

Mass inflation is a well established instability, conventionally associated to Cauchy horizons
(which are also inner trapping horizons) of stationary geometries, leading to a divergent …

While singularities are inevitable in the classical theory of general relativity, it is commonly
believed that they will not be present when quantum gravity effects are taken into account in …

A bstract Generic models of regular black holes have separate outer and inner horizons,
both with nonzero surface gravity. It has been shown that a nonzero inner horizon surface …

The 1965 Penrose singularity theorem demonstrates the utterly inevitable and unavoidable
formation of spacetime singularities under physically reasonable assumptions, and it …