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Neutron stars in Gauss-Bonnet extended Starobinsky gravity

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arxiv 2410.14108 v2 pith:JBVCN3BQ submitted 2024-10-18 gr-qc

Zhonghai Liu , Ziyi Li , Liang Liang , Shoulong Li , Hongwei Yu This is my paper
classification gr-qc
keywords gauss-bonnetgravityextendedneutronstarobinskystarsblackeffects
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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.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Black holes and neutron stars in massive Hellings-Nordtvedt theory

    gr-qc 2026-05 unverdicted novelty 7.0 of 10

    In massive Hellings-Nordtvedt theory, a nonzero vector vacuum asymptotically forbids both curvature-vector couplings at once, and the A²R sector yields Schwarzschild-like black holes plus neutron stars that can deviat...

  2. Scalarization of Charged Black Hole in Gauss-Bonnet Extended Starobinsky-Maxwell Gravity

    gr-qc 2026-07 conditional novelty 6.0 of 10

    In Gauss-Bonnet-extended Starobinsky gravity, scalarized black holes form two smoothly joined branches at fixed coupling; adding a Maxwell field can split the family into disconnected branches, and the first law is ch...

  3. Neutron stars more compact than black holes in quasi-topological gravity: Equilibrium configurations and radial stability

    gr-qc 2026-05 unverdicted novelty 6.0 of 10

    Neutron stars in quasi-topological gravity can be more compact than black holes and radially stable across several equations of state.

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