Advanced International Journal for Research

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Analytical Investigation of Neutron Star Models Using the Homotopy Perturbation Method

Author(s) Mohammad Ajazuddin, Dr. J.P Singh
Country India
Abstract Neutron stars represent one of the most compact astrophysical objects in the universe, characterized by extremely high densities and strong gravitational fields. The study of their internal structure requires the framework of general relativity, where the Einstein field equations and the Tolman–Oppenheimer–Volkoff (TOV) equation govern the equilibrium configuration of matter. However, these equations are highly nonlinear and difficult to solve analytically. In this work, the Homotopy Perturbation Method (HPM) is employed to obtain approximate analytical solutions for relativistic neutron star models. The method provides a systematic and rapidly convergent approach to handle nonlinear differential equations without the need for small perturbation parameters. The derived solutions are analyzed for physical acceptability by examining energy conditions, pressure and density profiles, causality constraints, and stability criteria. The results demonstrate that the Homotopy Perturbation Method offers an efficient and reliable semi-analytical technique for modeling neutron stars and understanding their structural properties under relativistic conditions.
Keywords Neutron Star, General Relativity, Homotopy Perturbation Method, Tolman–Oppenheimer–Volkoff Equation, Compact Stars
Field Physics
Published In Volume 6, Issue 6, November-December 2025
Published On 2025-12-27
DOI https://doi.org/10.63363/aijfr.2025.v06i06.2744
Short DOI https://doi.org/hbg69x

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