https://doi.org/10.1140/epjp/s13360-025-07185-0
Regular Article
A comparative study of gravitationally decoupled compact stellar systems in higher-dimensional Einstein–Gauss–Bonnet gravity
1
Department of Mathematics, Xiamen University Malaysia, Sepang, Malaysia
2
Department of Mathematics, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
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Received:
20
August
2025
Accepted:
7
December
2025
Published online:
18
December
2025
Abstract
This manuscript presents a novel class of compact stellar configurations within the framework of D-dimensional Einstein–Gauss–Bonnet gravity, motivated by the need to explore higher-dimensional gravitational effects on astrophysical objects, which remain largely unexplored. Our study employs the extended minimal geometric deformation approach to systematically generate physically viable stellar models, providing a bridge between gravitational decoupling techniques and higher-curvature corrections predicted by string-inspired gravity theories. Focusing on 5D and 6D scenarios, we solve the MGD equations by imposing appropriate constraints, using the Heintzmann IIa solution as a seed that satisfies essential physical requirements. We thoroughly analyse the resulting stellar structures, investigating energy density, radial and tangential pressures, stability via the adiabatic index, mass–radius relation, compactness, and surface redshift under varying Gauss–Bonnet coupling parameters. Our results reveal how higher-dimensional and higher-curvature corrections influence the physical properties and stability of compact stars, highlighting subtle but important trends across dimensions. This work not only extends the applicability of MGD to higher-dimensional EGB gravity but also provides a framework for constructing astrophysically realistic compact objects in modified gravity theories, offering new insights into strong-field regimes beyond four-dimensional general relativity.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
