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Résumé |
The gravitational wave detection GW170817 and its electromagnetic
counterpart GRB170817A tightly constrained the speed of gravitational
waves, and hence many modified theories of gravity. Among the
Horndeski's scalar-tensor theories compatible with this observation, the
cubic Galileon was known to admit static black holes different from the
Schwarzschild solution.
Within this context, I will present recent numerical solutions of
rotating black holes which generalize the pre-existing static
configurations of the cubic Galileon theory. These solutions show
significant deviations from Kerr, with astrophysical implications to
assess in light of the observations performed by the instrument GRAVITY
and the Event Horizon Telescope. |
