Dynamical Instability of Expansion-Free Collapse in f(T) Gravity

摘要: In this paper, we analyze the dynamical instability of a spherically symmetric collapsing star in context f(T) gravity. For purpose, assume power-law model with non-dissipative anisotropic fluid distribution under expansion-free condition. The perturbation scheme is applied to all matter, metric and functions. We formulate equations using contracted Bianchi identities investigate ranges Newtonian post-Newtonian regimes. It found that are independent adiabatic index but depend on radial density profile, pressure torsion terms.