Neutron stars in Gauss-Bonnet extended Starobinsky gravity
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913611314626560 |
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| author | Liu, Zhonghai Li, Ziyi Liang, Liang Li, Shoulong Yu, Hongwei |
| author_facet | Liu, Zhonghai Li, Ziyi Liang, Liang Li, Shoulong Yu, Hongwei |
| contents | Recently, a class of Gauss-Bonnet extended Starobinsky gravity was proposed, allowing black holes to carry ghost-free massive scalar hair for the first time without requiring additional matter fields. This intriguing feature offers a new perspective for understanding higher-curvature pure gravity and highlights the importance of further studying the potential effects of Gauss-Bonnet extensions in gravitational systems beyond black holes. In this study, we investigate the properties of neutron stars within this model, focusing on how the higher-curvature terms, particularly the coupling between the Gauss-Bonnet term and the curvature-squared term, impact the stellar structure. We present a detailed analysis of these effects and compute the moment of inertia for rotating neutron stars under the slow-rotation approximation. The substantial differences in the moment of inertia between general relativity and Gauss-Bonnet extended Starobinsky gravity are expected to be detectable through future high-precision observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_14108 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Neutron stars in Gauss-Bonnet extended Starobinsky gravity Liu, Zhonghai Li, Ziyi Liang, Liang Li, Shoulong Yu, Hongwei General Relativity and Quantum Cosmology Recently, a class of Gauss-Bonnet extended Starobinsky gravity was proposed, allowing black holes to carry ghost-free massive scalar hair for the first time without requiring additional matter fields. This intriguing feature offers a new perspective for understanding higher-curvature pure gravity and highlights the importance of further studying the potential effects of Gauss-Bonnet extensions in gravitational systems beyond black holes. In this study, we investigate the properties of neutron stars within this model, focusing on how the higher-curvature terms, particularly the coupling between the Gauss-Bonnet term and the curvature-squared term, impact the stellar structure. We present a detailed analysis of these effects and compute the moment of inertia for rotating neutron stars under the slow-rotation approximation. The substantial differences in the moment of inertia between general relativity and Gauss-Bonnet extended Starobinsky gravity are expected to be detectable through future high-precision observations. |
| title | Neutron stars in Gauss-Bonnet extended Starobinsky gravity |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2410.14108 |