Adiabatic index, Γ, as a function of radial coordinate within nonlinear model of ﹩f({ \mathcal R },{{ \mathcal L }}_{m},{ \mathcal T })﹩ gravity. The solid black line denotes the GR, while the colored lines represent the different values of α. Here, the purple dashed line represents Γ = 4/3 below which a stellar object will be unstable.