Spacetime approach to force-free magnetospheres

By S. Gralla, T. Jacobson. 2014

139 citations recorded by the source corpus.

Force-Free Electrodynamics (FFE) describes magnetically dominated relativistic plasma via non-linear equations for the electromagnetic field alone. Such plasma is thought to play a key role in the physics of pulsars and active black holes. Despite its simple covariant formulation, FFE has primarily been studied in 3+1 frameworks, where spacetime is split into space and time. In this article we systematically develop the theory of force-free magnetospheres taking a spacetime perspective. Using a suite of spacetime tools and techniques (notably exterior calculus) we cover 1) the basics of the theory, 2) exact solutions that demonstrate the extraction and transport of the rotational energy of a compact object (in the case of a black hole, the Blandford-Znajek mechanism), 3) the behavior of current sheets, 4) the general theory of stationary, axisymmetric magnetospheres and 5) general properties of pulsar and black hole magnetospheres. We thereby synthesize, clarify and generalize known aspects of the physics of force-free magnetospheres, while also introducing several new results.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c9c756975a328d00276adf24a2a77d764e494718

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In Astronomy and Astrophysics

  1. Paolo Pani
  2. R. Brito
  3. V. Cardoso
  4. Jorge E Santos
  5. Carlos A. R. Herdeiro
  6. Kent Yagi
  7. Gavin Hartnett
  8. Emanuele Berti

In Nuclear and High Energy Physics

  1. R. Brito
  2. Paolo Pani
  3. V. Cardoso
  4. Jorge E Santos
  5. Gavin Hartnett
  6. Ó. J. Dias
  7. R. Konoplya
  8. A. Starinets

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