1 citations · 1 across the 2 of their papers we have counts for
10 papers
Dynamical axisymmetric compact objects in General Relativity
Jibril Ben Achour, Adolfo Cisterna, Mokhtar Hassaine
The search for exact solutions describing asymptotically FLRW compact objects in General Relativity remains a challenging problem. Progress has largely been limited to the spherica…
Magnetized dynamical black holes
Jibril Ben Achour, Adolfo Cisterna, Amaro DÃaz +1
We construct a novel exact solution of the Einstein-scalar-Maxwell equations describing a dynamical black hole immersed in an external, time-dependent electromagnetic field. Motiva…
Jet launching from the Kerr black hole magnetosphere: An electrogeodesic approach
Jibril Ben Achour, Ileyk El Mellah, Eric Gourgoulhon
The launch of relativistic jets of plasma on astrophysical to cosmological scales is observed in a variety of astrophysical sources, from active galactic nuclei to X-ray binaries.…
Symmetries of cosmological perturbations: The residual low-multipole ambiguity
Jibril Ben Achour, Etera Livine, Vincent Vennin
In cosmology, long-wavelength modes are related to large-gauge transformations (LGT), i.e. changes of coordinates that modify the physical geometry of the cosmological patch. These…
A Circular Disformal Kerr Black Hole
Jibril Ben Achour, Adolfo Cisterna, Hugo Roussille
The Kerr solution is the cornerstone of General Relativity (GR) for modelling astrophysical rotating black holes and for testing GR through gravitational-wave observations and blac…
Algebraically special perturbations of the Kerr black hole: a metric formulation
Jibril Ben Achour, Clara Montagnon, Hugo Roussille
Perturbations of the Kerr black hole are notoriously difficult to describe in the metric formalism and are usually studied in terms of perturbations of the Weyl scalars. In this wo…