Five-dimensional compact stars in Einstein-Gauss-Bonnet gravity
Fuente:
arXiv
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Preprint |
| Published: |
2021
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913543660503040 |
|---|---|
| author | Pretel, Juan M. Z. Banerjee, Ayan Pradhan, Anirudh |
| author_facet | Pretel, Juan M. Z. Banerjee, Ayan Pradhan, Anirudh |
| contents | Within the framework of Einstein-Gauss-Bonnet theory in five-dimensional spacetime ($5D$ EGB), we derive the hydrostatic equilibrium equations and solve them numerically to obtain neutron stars for both isotropic and anisotropic distribution of matter. The mass-radius relations are obtained for SLy equation of state, which describes both the solid crust and the liquid core of neutron stars, and for a wide range of the Gauss-Bonnet coupling parameter $α$. More specifically, we find that the contribution of the Gauss-Bonnet term leads to substantial deviations from Einstein gravity. We also discuss that after a certain value of $α$, the theory admits higher maximum masses compared with general relativity, however, the causality condition is violated in the high-mass region. Finally, our results are compared with the recent observations data on mass-radius diagram. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2107_03859 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Five-dimensional compact stars in Einstein-Gauss-Bonnet gravity Pretel, Juan M. Z. Banerjee, Ayan Pradhan, Anirudh General Relativity and Quantum Cosmology Within the framework of Einstein-Gauss-Bonnet theory in five-dimensional spacetime ($5D$ EGB), we derive the hydrostatic equilibrium equations and solve them numerically to obtain neutron stars for both isotropic and anisotropic distribution of matter. The mass-radius relations are obtained for SLy equation of state, which describes both the solid crust and the liquid core of neutron stars, and for a wide range of the Gauss-Bonnet coupling parameter $α$. More specifically, we find that the contribution of the Gauss-Bonnet term leads to substantial deviations from Einstein gravity. We also discuss that after a certain value of $α$, the theory admits higher maximum masses compared with general relativity, however, the causality condition is violated in the high-mass region. Finally, our results are compared with the recent observations data on mass-radius diagram. |
| title | Five-dimensional compact stars in Einstein-Gauss-Bonnet gravity |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2107.03859 |