We release the first Numerical Relativity catalog of Institut de Ciencies del Cosmos at University of Barcelona (ICCUB) consisting of 128 simulations for black hole binaries. All simulations in this first release correspond to highly eccentric binaries with eccentricity ϵ = (0.62, 0.79) which develop zoom-whirls up to three close passages before merger. We consider aligned, equal spin...
Recently, it has been shown that the addition of an infinite tower of higher-curvature terms to the Einstein-Hilbert action in dimensions greater or equal than five regularises the Schwarzschild black hole singularity. In this talk, I will present a dynamical process of thin-shell collapse which leads to the formation of these regular black holes. Starting at some finite radius, the shell...
The thermodynamics of black holes inspired the concept of black hole entropy, linking gravity and thermodynamics. When applied to cosmology, this leads to the standard Friedmann equations, which face challenges in explaining the universe’s evolution. Modified entropies have been proposed to resolve these issues. A recently introduced four-parameter generalized entropy unifies several known...
