Location

Virtual

Start Date

5-10-2021 9:35 AM

End Date

5-10-2021 9:45 AM

Description

Relativistic-jet formation in astrophysical black holes lacks a rigorously understood mechanism of energy extraction in the high-energy regime although, in recent years, progress has been made in extending the non-linear equations of Force-Free Electrodynamics (FFE) into the high-spin regime. In particular, M. J. Rodriguez and A. Strominger were able to show, using the Near Horizon Extremal Kerr spacetime, that the near horizon FFE solutions have an additional scaling symmetry which allows the construction of a pseudo-analytical infinite tower of solutions. These families of solutions stand in stark contrast to the relatively few full Kerr solutions found analytically: this tension can only be resolved by excluding, or extending, the infinite towers of NHEK solutions under some physical criteria.

Available for download on Tuesday, May 10, 2022

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May 10th, 9:35 AM May 10th, 9:45 AM

Seeking the Origin of Electromagnetic Signatures of Black Holes

Virtual

Relativistic-jet formation in astrophysical black holes lacks a rigorously understood mechanism of energy extraction in the high-energy regime although, in recent years, progress has been made in extending the non-linear equations of Force-Free Electrodynamics (FFE) into the high-spin regime. In particular, M. J. Rodriguez and A. Strominger were able to show, using the Near Horizon Extremal Kerr spacetime, that the near horizon FFE solutions have an additional scaling symmetry which allows the construction of a pseudo-analytical infinite tower of solutions. These families of solutions stand in stark contrast to the relatively few full Kerr solutions found analytically: this tension can only be resolved by excluding, or extending, the infinite towers of NHEK solutions under some physical criteria.