Influence of three parameters on maximum mass and stability of strange star under linear <i>f</i>(<i>Q</i>) − action

Abstract

ABSTRACT This study simulates strange stars in f(Q) gravity with an additional source under an electric field using gravitational decoupling by means of the complete geometric deformation (CGD) technique. By employing the Tolman ansatz and the MIT bag model equation of state (EOS), we explore bounded star configurations derived from the $\theta _0^0 = \rho$ and $\theta _1^1 = p_r$ sectors within the CGD formalism. Our models are subjected to physical viability tests, and we analyse the impact of anisotropy and the electric charge parameter E0 as well as the coupling parameters α and β1. Comparisons are made with observational constraints, including GW190814, neutron stars PSR J1614-2230, PSR J1903 + 6620, Cen X-3, and LMC X-4. Notably, we achieve the presence of a lower ‘mass gap’ component by adjusting parameters α and β1. Our models exhibit well-behaved mass profiles, internal regularity, and stability, along with the absence of gravitational collapse verified through the Buchdahl–Andréasson’s limit. In addition, we present a detailed physical analysis based on three parameters, α (decoupling strength), β1 (f(Q)–coupling), and Q (surface charge). This study provides insights into the behaviour of compact objects in f(Q) gravity and expands our understanding of strange star configurations within this framework.