Relativisitic non-pascalian fluid as a density contribution
Abstract Understanding the role of pressure anisotropy and dissipation is crucial for modelling compact objects’ internal structure and observable properties. In this work, we reinterpret local pressure anisotropy in relativistic stellar structures as an additional contribution to the energy density...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-04-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14132-x |
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| author | Justo Ospino Daniel Suárez-Urango Laura M. Becerra H. Hernández Luis A. Núñez |
| author_facet | Justo Ospino Daniel Suárez-Urango Laura M. Becerra H. Hernández Luis A. Núñez |
| author_sort | Justo Ospino |
| collection | DOAJ |
| description | Abstract Understanding the role of pressure anisotropy and dissipation is crucial for modelling compact objects’ internal structure and observable properties. In this work, we reinterpret local pressure anisotropy in relativistic stellar structures as an additional contribution to the energy density. This perspective enables the formulation of anisotropic equations of state for self-gravitating systems by incorporating anisotropy as a fundamental component. We demonstrate that this approach yields more realistic stellar models that satisfy key physical constraints, including mass-radius relationships and stability conditions. Our results are compared with observational data, particularly the inferred compactness of pulsars PSR J0740+6620 and PSR J0030+0451, showing that both anisotropic and isotropic models can describe these objects. Additionally, we examine the influence of dissipation – such as temperature gradients – on radial pressure, demonstrating that it can be modelled similarly to anisotropy. This interpretation allows the transformation of dissipative anisotropic models into equivalent non-dissipative isotropic configurations. |
| format | Article |
| id | doaj-art-d3aff92e18ef4938b6cd795c79f82c3d |
| institution | OA Journals |
| issn | 1434-6052 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-d3aff92e18ef4938b6cd795c79f82c3d2025-08-20T02:17:56ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522025-04-0185411310.1140/epjc/s10052-025-14132-xRelativisitic non-pascalian fluid as a density contributionJusto Ospino0Daniel Suárez-Urango1Laura M. Becerra2H. Hernández3Luis A. Núñez4Departamento de Matemática Aplicada, Universidad de SalamancaEscuela de Física, Universidad Industrial de SantanderCentro Multidisciplinario de Física, Vicerrectoría de Investigación, Universidad MayorEscuela de Física, Universidad Industrial de SantanderEscuela de Física, Universidad Industrial de SantanderAbstract Understanding the role of pressure anisotropy and dissipation is crucial for modelling compact objects’ internal structure and observable properties. In this work, we reinterpret local pressure anisotropy in relativistic stellar structures as an additional contribution to the energy density. This perspective enables the formulation of anisotropic equations of state for self-gravitating systems by incorporating anisotropy as a fundamental component. We demonstrate that this approach yields more realistic stellar models that satisfy key physical constraints, including mass-radius relationships and stability conditions. Our results are compared with observational data, particularly the inferred compactness of pulsars PSR J0740+6620 and PSR J0030+0451, showing that both anisotropic and isotropic models can describe these objects. Additionally, we examine the influence of dissipation – such as temperature gradients – on radial pressure, demonstrating that it can be modelled similarly to anisotropy. This interpretation allows the transformation of dissipative anisotropic models into equivalent non-dissipative isotropic configurations.https://doi.org/10.1140/epjc/s10052-025-14132-x |
| spellingShingle | Justo Ospino Daniel Suárez-Urango Laura M. Becerra H. Hernández Luis A. Núñez Relativisitic non-pascalian fluid as a density contribution European Physical Journal C: Particles and Fields |
| title | Relativisitic non-pascalian fluid as a density contribution |
| title_full | Relativisitic non-pascalian fluid as a density contribution |
| title_fullStr | Relativisitic non-pascalian fluid as a density contribution |
| title_full_unstemmed | Relativisitic non-pascalian fluid as a density contribution |
| title_short | Relativisitic non-pascalian fluid as a density contribution |
| title_sort | relativisitic non pascalian fluid as a density contribution |
| url | https://doi.org/10.1140/epjc/s10052-025-14132-x |
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