Modeling Gravastar Structure admitting Kuchowicz Spacetime in Rastall Gravity Theory
Fuente:
arXiv
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912602418839552 |
|---|---|
| author | Naseer, Tayyab Sharif, M. Tabassum, Areej |
| author_facet | Naseer, Tayyab Sharif, M. Tabassum, Areej |
| contents | This paper investigates the gravastar model as a potential alternative to black holes, utilizing the Kuchowicz metric in the context of Rastall gravity. The model comprises three distinct regions: an interior with positive energy density and negative pressure, a thin intermediate shell made of ultra-relativistic stiff fluid, and an exterior vacuum. The negative pressure within the interior generates an outward force exerted on the shell, fulfilling the Zel'dovich criterion. This configuration eliminates the central singularity and replaces the event horizon with the shell. We then derive the radial metric functions for both the inner and thin region, yielding a non-singular solution. Furthermore, we examine the physical properties of the shell, such as its energy, proper length, entropy, equation of state parameter, gravitational redshift and adiabatic index, across a range of Rastall parameter values. We conclude that the resulting gravastar model offers a promising solution to the singularity problem of conventional black holes within the context of this non-conservative theory. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_19728 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Modeling Gravastar Structure admitting Kuchowicz Spacetime in Rastall Gravity Theory Naseer, Tayyab Sharif, M. Tabassum, Areej General Relativity and Quantum Cosmology This paper investigates the gravastar model as a potential alternative to black holes, utilizing the Kuchowicz metric in the context of Rastall gravity. The model comprises three distinct regions: an interior with positive energy density and negative pressure, a thin intermediate shell made of ultra-relativistic stiff fluid, and an exterior vacuum. The negative pressure within the interior generates an outward force exerted on the shell, fulfilling the Zel'dovich criterion. This configuration eliminates the central singularity and replaces the event horizon with the shell. We then derive the radial metric functions for both the inner and thin region, yielding a non-singular solution. Furthermore, we examine the physical properties of the shell, such as its energy, proper length, entropy, equation of state parameter, gravitational redshift and adiabatic index, across a range of Rastall parameter values. We conclude that the resulting gravastar model offers a promising solution to the singularity problem of conventional black holes within the context of this non-conservative theory. |
| title | Modeling Gravastar Structure admitting Kuchowicz Spacetime in Rastall Gravity Theory |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2509.19728 |