Gravitational collapse of dust fluid and dark energy in the presence of curvature: Black hole formation

Study of gravitational collapse and black hole formation has got much interest in recent years after gravitational waves detection from mergers of black hole binaries. Here, we studied the gravitational collapse of a spherically symmetric clump of matter, constituted of dust fluid, rho(M), in a background of dark energy, rho. We investigate the curvature effect (k = 0,1, -1) on the gravitational collapsing process. Gravitational collapsing process for two different cases is discussed i.e. collapse of dust cloud only and collapse of dark energy. We used equation of state p = omega rho, omega < -1/3. For dark energy case, we discuss the collapsing process and curvature effect for different parameter values of equation of state.