IberiCos 2025

Session

Session 8 - Gravity

15 Apr 2025, 16:45

Auditorium C.1

Conveners

Session 8 - Gravity

• Session convener: José Mimoso

3. Electromagnetic wormholes

Ms MARÍA PÉREZ GARROTE (USAL)

15/04/2025, 16:45

Talk

I will discuss how the effective geometry seen by photons propagating on a non-trivial electromagnetic background within Born-Infeld theory corresponds to an asymmetric wormhole. I will explain some interesting properties of the generated geometry such as the behaviour of null geodesics. Interestingly, the wormhole effective geometry arises for the background fields created by a charged...

17. Penrose and super-Penrose energy extraction from a Reissner-Nordström black hole spacetime with a cosmological constant through the Bañados-Silk-West mechanism

Duarte Feiteira (Department of Physics, University of Helsinki)

15/04/2025, 17:00

Talk

The Penrose process consists of transferring energy from a black hole to infinity. This process can be studied in a combined description with the Bañados-Silk-West (BSW) mechanism, which uses collisions of ingoing particles at the event horizon of a black hole to locally produce large amounts of energy. In this talk, the blending of the Penrose process with BSW mechanism is described for a $d$...

28. Two nonlinear electromagnetic generalizations of the Kerr-Newman-AdS-NUT Black holes.

Mr Oscar Jaime Michelin Galindo-Uriarte

15/04/2025, 17:15

Talk

We present two nonlinear electromagnetic black hole solutions belonging to the Kerr-Newman-AdS-NUT family, referred to as cubic potential and quartic potential. These solutions are characterized by mass, angular momentum, electric and magnetic charge, the NUT parameter, the cosmological constant, and a nonlinear parameter. We provide the necessary electromagnetic potentials to generate these...

29. Energy extraction from electrostatic black holes.

José Arturo Báez Jiménez (Center of Research and Advanced Studies (CINVESTAV))

15/04/2025, 17:30

Talk

This work explores the extraction of energy from electrostatic black holes through the decay or splitting of electrically charged particles. We establish the energetic criteria for viable extraction, deriving a general expression for the efficiency that depends on black hole and particle parameters. Focusing on Reissner-Nordström (RN) and Reissner-Nordström-de Sitter (RNdS) black holes, we...

14. Wormhole effective mass and gravitational waves by binary wormhole

Sung-Won Kim (Ewha Womans University)

15/04/2025, 17:45

Talk

We considered the generation of gravitational waves by the binary system associated with a wormhole. In the Newtonian limit, the gravitational potential of a wormhole requires the effective mass of the wormhole taking into account radial tension effects. This definition allows us to derive gravitational wave production in homogeneous and heterogeneous binary systems. Therefore, we studied...