https://doi.org/10.1140/epjc/s10052-024-13174-x
Letter
New one-parameter models of dynamical particles in spatially flat FLRW space-times
West University of Timişoara, V. Pârvan Ave. 4, 300223, Timisoara, Romania
Received:
9
July
2024
Accepted:
28
July
2024
Published online:
14
August
2024
New one-parameter models of non-rotating dynamical particles are derived as isotropic solutions of Einstein’s equations with perfect fluid in space-times with FLRW asymptotic behaviour, thus generalizing the models recently proposed by Cotăescu (Eur. Phys. J. C 82:86, 2022). These particles are produced by central singularities of the fluid density but without changing the pressure of the asymptotic FLRW space-times. The principal features of these models are investigated using a brief graphical analysis to elucidate the role of the new free parameter. The conclusion is that this gives rise to families of models which behave as non-rotating black holes in the physical space domain bordered by the black hole and cosmological horizons.
© The Author(s) 2024
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