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 …

In the last four decades, different programs have been carried out aiming at understanding
the final fate of gravitational collapse of massive bodies once some prescriptions for the …

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 …

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 …

Structure at the horizon scale of black holes would give rise to echoes of the gravitational
wave signal associated with the postmerger ringdown phase in binary coalescences. We …

Gravitational wave astronomy provides an unprecedented opportunity to test the nature of
black holes and search for exotic, compact alternatives. Recent studies have shown that …

We show that there is a classical metric satisfying the Einstein equations outside a finite
spacetime region where matter collapses into a black hole and then emerges from a white …

We investigate the weak and strong deflection gravitational lensing by a black-bounce-
Reissner–Nordström spacetime and obtain their lensing observables. Assuming the …

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

Quantum tunneling of a black hole into a white hole provides a model for the full life cycle of
a black hole. The white hole acts as a long-lived remnant, providing a possible resolution to …