New one-parameter models of dynamical particles in spatially flat FLRW space-times
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arXiv
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909308455747584 |
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| author | Cotaescu, Ion I. |
| author_facet | Cotaescu, Ion I. |
| contents | 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 generalizing thus the models proposed recently in [I. I. Cot\u aescu, Eur. Phys. J. C (2022) 82:86]. 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 for pointing out 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_06389 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | New one-parameter models of dynamical particles in spatially flat FLRW space-times Cotaescu, Ion I. General Relativity and Quantum Cosmology 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 generalizing thus the models proposed recently in [I. I. Cot\u aescu, Eur. Phys. J. C (2022) 82:86]. 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 for pointing out 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. |
| title | New one-parameter models of dynamical particles in spatially flat FLRW space-times |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2408.06389 |