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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.09262 |
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| _version_ | 1866915929968869376 |
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| author | Semrén, Philip Bradley, Michael Oliveira, João M. S. Ramos, M. Piedade Machado |
| author_facet | Semrén, Philip Bradley, Michael Oliveira, João M. S. Ramos, M. Piedade Machado |
| contents | A simplified relativistic kinetic theory for gases with internal degrees of freedom, based on a BGK-type collision term, is considered. First the Boltzmann equation is rewritten in tetrad form and then thermal coefficients are determined to first order in the Chapman-Enskog expansion for general spacetimes. The results are used to construct a self-consistent system of first order differential equations, equivalent to the Einstein-Boltzmann system, for some spatially homogeneous models with viscosity and heat flow. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_09262 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The near equilibrium Einstein-Boltzmann system with a simplified collision term Semrén, Philip Bradley, Michael Oliveira, João M. S. Ramos, M. Piedade Machado General Relativity and Quantum Cosmology A simplified relativistic kinetic theory for gases with internal degrees of freedom, based on a BGK-type collision term, is considered. First the Boltzmann equation is rewritten in tetrad form and then thermal coefficients are determined to first order in the Chapman-Enskog expansion for general spacetimes. The results are used to construct a self-consistent system of first order differential equations, equivalent to the Einstein-Boltzmann system, for some spatially homogeneous models with viscosity and heat flow. |
| title | The near equilibrium Einstein-Boltzmann system with a simplified collision term |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2604.09262 |