Exploring the Impact of Anisotropy Parameters on Stellar Structure
Toktarbay S. Beissen N. Khassanov M. Muratkhan A. Orazymbet A. Sadu A. Shynggyskhan N.
20 December 2025al-Farabi Kazakh State National University
International Journal of Mathematics and Physics
2025#16Issue 24 - 11 pp.
In this study, we examine how variations in local pressure anisotropy affect the internal structure and equilibrium of white dwarfs. A generalized anisotropy model is developed, defined by three parameters: the amplitude coefficient α₀ and the shape exponents l and k. This formulation ensures that the anisotropic pressure continuously vanishes at both the center and surface of the star while reaching a single peak in the intermediate region. By applying appropriate boundary and regularity conditions, the model allows us to determine physically stable parameter domains consistent with realistic stellar configurations. Our analysis shows that even a small degree of anisotropy can have a measurable effect on the mass-radius relation and overall compactness of white dwarfs, which may help explain the origin of super-Chandrasekhar systems observed in astrophysical data. This modeling approach provides a clear and flexible way to describe compact stars with anisotropic pressures and can also be applied to neutron and quark stars.
anisotropic pressure , compact stars , generalized anisotropic factor , stability analysis , white dwarfs
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Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Faculty of Natural Sciences, Université Paris-Saclay, Gif-sur-Yvette, France
Department of Theoretical and Nuclear Physics
Faculty of Natural Sciences
10 лет помогаем публиковать статьи Международный издатель
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