Blandford-Znajek process in quadratic gravity

Jameson Dong, Nicolás Patiño, Yiqi Xie, Alejandro Cárdenas-Avendaño, Charles F. Gammie, Nicolás Yunes

Research output: Contribution to journalArticlepeer-review


The Blandford-Znajek process, which uses a magnetized plasma to extract energy from a rotating black hole, is one of the leading candidates for powering relativistic jets. In this work, we investigate the Blandford-Znajek process in two well-motivated quadratic gravity theories: scalar Gauss-Bonnet and dynamical Chern-Simons gravity. We solve analytically for a split-monopole magnetosphere to first order in the small-coupling approximation and second relative order in the slow-rotation approximation. The extracted power at fixed spin and magnetic flux is enhanced in scalar Gauss-Bonnet and reduced in dynamical Chern-Simons gravity, compared to general relativity. We find that there is a degeneracy between spin and the coupling constants of the theories at leading order in the slow rotation approximation that is broken at higher orders.

Original languageEnglish (US)
Article number044008
JournalPhysical Review D
Issue number4
StatePublished - Feb 15 2022

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Blandford-Znajek process in quadratic gravity'. Together they form a unique fingerprint.

Cite this