Zobrazeno 1 - 10
of 770
pro vyhledávání: '"Kunz, Jutta"'
Hairy dyonic Reissner-Nordstr\'om black holes in an Einstein-Maxwell-Friedberg-Lee-Sirlin type model
We construct spherically symmetric dyonic black holes in a generalized Maxwell-Friedberg-Lee-Sirlin type model with a complex scalar doublet and a symmetry breaking potential {for the real scalar field}, minimally coupled to Einstein gravity in asymp
Externí odkaz:
http://arxiv.org/abs/2407.21463
Quasinormal modes of rapidly rotating black holes are crucial in understanding the ringdown phase after a merger. While for Kerr black holes these modes have been known for a long time, their calculation has remained a challenge in alternative theori
Externí odkaz:
http://arxiv.org/abs/2407.20760
We consider self-gravitating Skyrmions in the presence of Dirac fermions, that carry spin and isospin. By varying the gravitational and the Yukawa coupling constants, we investigate the spectral flow of the fermion eigenvalue associated with a zero m
Externí odkaz:
http://arxiv.org/abs/2407.17504
We discuss the motion of electrically and magnetically charged particles in the electromagnetic swirling universe. We show that the equations of motion can be decoupled in the Hamilton-Jacobi formalism, revealing the existence of a fourth constant of
Externí odkaz:
http://arxiv.org/abs/2407.03702
We consider a model with two real Maxwell fields (or equivalently, a complex Maxwell field) minimally coupled to Einsteins gravity with a negative cosmological constant in four spacetime dimensions. Assuming a specific harmonic dependence of the vect
Externí odkaz:
http://arxiv.org/abs/2405.10671
Publikováno v:
Phys. Rev. D 109, 124051 (2024)
We consider slowly rotating Ellis-Bronnikov wormholes and investigate their radial perturbations ($\mathrm{l}=0$), expanding up to second order in rotation. We present the detailed derivations in the general case, including symmetric and non-symmetri
Externí odkaz:
http://arxiv.org/abs/2403.08387
{\it Hunting} compact astrophysical objects such as black holes and wormholes, as well as testing gravity theories, are important issues in relativistic astrophysics. In this sense, theoretical and observational studies of quasiperiodic oscillations
Externí odkaz:
http://arxiv.org/abs/2403.08356
A beyond Horndeski theory is considered that admits wormholes, black holes and naked singularities. In this theory the shadow images of the black holes and the exotic compact objects (ECOs), illuminated by an optically and geometrically thin disk, ar
Externí odkaz:
http://arxiv.org/abs/2401.15249
Boson stars are considered as promising candidates for black hole mimickers. Similar to other compact objects they can form accretion disks around them. The properties of these disks could possibly distinguish them from other compact objects like bla
Externí odkaz:
http://arxiv.org/abs/2401.13857
Autor:
Khoo, Fech Scen, Azad, Bahareh, Blázquez-Salcedo, Jose Luis, González-Romero, Luis Manuel, Kleihaus, Burkhard, Kunz, Jutta, Navarro-Lérida, Francisco
Publikováno v:
Phys. Rev. D 109, 084013 (2024)
We present for the first time a study of the quasinormal modes of rapidly rotating Ellis-Bronnikov wormholes in General Relativity. We compute the spectrum of the wormholes using a spectral decomposition of the metric perturbations on a numerical bac
Externí odkaz:
http://arxiv.org/abs/2401.02898