https://doi.org/10.1140/epjc/s10052-024-12382-9
Regular Article - Theoretical Physics
The river model of gravitational collapse
School of Advanced Science, Vellore Institute of Technology, Tiruvalam Rd, Katpadi, 632014, Vellore, Tamil Nadu, India
a
soumya.chakrabarti@vit.ac.in
Received:
8
August
2023
Accepted:
2
January
2024
Published online:
11
January
2024
We show that the transformation of a time-evolving spherically symmetric metric tensor into a Painlevé–Gullstrand–Lemaître form brings forth a few curious consequences. The time evolution describes a non-singular gravitational collapse, leading to a bounce and dispersal of all the clustered matter, or a wormhole geometry for certain initial conditions. The null convergence condition is violated only at the onset of bounce or the wormhole formation. As an example, the requirements to develop a Simpson–Visser wormhole/regular black-hole geometry is discussed. The solution can be regarded as a new time-evolving twin of sonic dumb holes found in analog gravity.
© The Author(s) 2024
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