Impact of symmetric teleparallel gravity on charged stars exhibiting dark energy background

Dark energy is considered one of the potential mechanisms for preventing compact objects from collapsing into singularities. Given its role in driving the accelerated expansion of the universe, dark energy is likely to interact with any compact stellar object in the cosmos. In this study, we examine four charged stars: Her X-1, SMC X-1, LMC X-4, and Cen X-3. These stars have masses of 0.85 M ae , 1.04 M ae , 1.29 M ae , and 1.49 M ae , respectively, and radii of 9.458 km, 10.067 km, 10.75 km, and 11.224 km, respectively within the framework of f(Q) gravity, specifically coupled with anisotropic dark energy in Karmarkar spacetime. The study begins by deriving the f(Q) gravity field equations using the non-metric scalar Q . Subsequently, dark energy is modeled through an equation of state (EoS), where the dark energy density is proportional to the matter-energy density of an isotropic perfect fluid. The Darmois-Israel junction conditions are employed to determine the unknown constants present in the metric. In this investigation, we explore various properties of dark energy stellar models, including the mass-energy radius relation, dark energy pressure components, energy conditions, metric functions, equation of state components, sound speeds, adiabatic index, gradients, mass function, compactness, and redshift function. Additionally, we examine the stability and force equilibrium of the proposed stellar configuration. Through comprehensive theoretical analysis, we find that the suggested model is free from singularities and satisfies all stability criteria, affirming the viability and realism of the stellar configuration under study.