6533b838fe1ef96bd12a454e
RESEARCH PRODUCT
The role of the ergosphere in the Blandford-Znajek process
Milton RuizCarlos PalenzuelaFilippo GaleazziCarles Bonasubject
Electromagnetic fieldPhysicsGeneral Relativity and Quantum CosmologyStarsRotating black holeAstrophysical jetSpace and Planetary ScienceAstrophysics::High Energy Astrophysical PhenomenaQuantum electrodynamicsBlandford–Znajek processAstronomy and AstrophysicsErgosphereMagnetic fielddescription
The Blandford-Znajek process, one of the most promising model for powering the relativistic jets from black holes, was initially introduced as a mechanism in which the magnetic fields extract energy from a rotating black hole. We study the evolution of force-free electromagnetic fields on regular spacetimes with an ergosphere, which are generated by rapidly rotating stars. Our conclusive results confirm previous works, claiming that the Blandford-Znajek mechanism is not directly related to the horizon of the black hole. We also show that the radiated energy depends exponentially on the compactness of the star.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-04-19 | Monthly Notices of the Royal Astronomical Society |