A relativistic stellar model for 'mass gap' compact objects (about 2.5-3 solar masses) built by applying the gravitational-decoupling (geometric deformation) technique to a seed solution of Einstein's field equations, adding an anisotropic matter source, and closing the system with an MIT-bag strange-quark-matter equation of state. By varying the decoupling constant and bag constant, the model reproduces maximum masses and radii consistent with the compact objects seen in gravitational-wave events such as GW190814 and GW200210, and predicts their mass-radius and mass-moment-of-inertia relations.
A relativistic stellar-structure study of 'mass gap' compact objects (roughly 2.5-3 solar masses, between the heaviest neutron stars and lightest black holes) such as the secondaries in the gravitati…