Gravastar model in Randall-Sundrum braneworld
| Autor: | José D. V. Arbañil, Manuel Malheiro, Pedro H. R. S. Moraes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Gravity (chemistry) Physics::General Physics Physics and Astronomy (miscellaneous) Gravastar FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics General Relativity and Quantum Cosmology Stars Theoretical physics Gravitational collapse Dark energy Schwarzschild radius Physical quantity |
| Popis: | In this work we derive a gravastar model in Randall-Sundrum II braneworld scenario. Gravastars (or gravitationally vacuum stars) were proposed by Mazur and Mottola as systems of gravitational collapse alternative to black holes. The external region of the gravastar is described by a Schwarzschild space-time, while its internal region is filled by dark energy. In between there is a thin shell surface with ultrarelativistic matter (sometimes referred to as stiff matter). We obtain solutions for some physical quantities of the braneworld gravastars. Those are compared to original Mazur-Mottola results as well as with some gravastar solutions in alternative gravity theories. The consequences of the braneworld setup in gravastar physics is deeply discussed. 12 pages |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|