2018/07/12 by M. Sharif, Arfa Waseem
Physics and Astronomy · #Adiabatic process #Anisotropy #Causality (physics) #Chandrasekhar limit #Cosmology and Gravitation Theories #Coupling (piping) #Equation of state #Hydrostatic equilibrium #Polytropic process #Pulsars and Gravitational Waves Research #Redshift #Stellar, planetary, and galactic studies #TRACE (psycholinguistics) #gr-qc
paper · pdf · doi:10.1142/s021827181950007x
published as Int. J. Mod. Phys. D 27(2018)1950007 · 27 pages, 8 figures, to appear in IJMPD
openalex publication_date 2018/07/12 · arxiv created 2018/12/18 · openalex created_date 2019/01/11 · arxiv updated 2019/02/19 · openalex updated_date 2026/08/05
This paper analyzes the anisotropic stellar evolution governed by polytropic equation-of-state in the framework of [Formula: see text] gravity, where [Formula: see text]. We construct the field equations, hydrostatic equilibrium equation and trace equation to obtain their solutions numerically under the influence of [Formula: see text] gravity model, where [Formula: see text] and [Formula: see text] are arbitrary constants. We examine the dependence of various physical characteristics such as radial/tangential pressure, energy density, anisotropic factor, total mass and surface redshift for specific values of the model parameters. The physical acceptability of the considered model is discussed by verifying the validity of energy conditions, causality condition and adiabatic index. We also study the effects arising due to strong nonminimal matter-curvature coupling on anisotropic polytropes. It is found that the polytropic stars are stable and their maximum mass point lies within the required observational Chandrasekhar limit.