期刊
ANNALS OF PHYSICS
卷 439, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2022.168769
关键词
Gravastar; Gravitational decoupling; Analytical solutions; Anisotropy; Modified gravity theories
By adopting the minimal geometric deformation (MGD) procedure, we have developed an analytical version of the gravastar model with non-uniform and anisotropic features in the framework of f (R, T) gravity. This new model describes an ultracompact stellar structure with a radius of R-S = 2M, and it satisfies several fundamental properties of a stable configuration.
Adopting gravitational decoupling through minimal geometric deformation (MGD) procedure, we develop an analytical version of gravastar model with non-uniform and anisotropic features, in the framework of f (R, T) gravity. This new non-uniform model describes an ultracompact stellar structure of radius R-S = 2M, whose interior solution smoothly joins a conformally deformed Schwarzschild exterior solution, and also it is matched to the standard Schwarzschild exterior solution under some restrictions on f (R, T) coupling constant lambda. The constructed solution presents a family of stellar models satisfying some of the fundamental properties of a stable configuration, including a positive energy density everywhere with monotonically decreasing behavior from the center to surface. Besides, a non-uniform pressure is observed with monotonic behavior. All the energy conditions except the strong one are satisfied inside the ultracompact stellar configuration for all the values of f (R, T) coupling constant lambda, which are compatible with regularity condition.(c) 2022 Elsevier Inc. All rights reserved.
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