Browsing by Author "Lupsasca, Alexandru"

Now showing items 1-3 of 3

    • Force-free electrodynamics around extreme Kerr black holes 

      Lupsasca, Alexandru Victor; Rodriguez, Maria; Strominger, Andrew E. (Springer Science + Business Media, 2014)
      Plasma-filled magnetospheres can extract energy from a spinning black hole and provide the power source for a variety of observed astrophysical phenomena. These magnetospheres are described by the highly nonlinear equations ...

    • Near-horizon Kerr magnetosphere 

      Gralla, Samuel E.; Lupsasca, Alexandru Victor; Strominger, Andrew E. (American Physical Society (APS), 2016)
      We exploit the near-horizon conformal symmetry of rapidly spinning black holes to determine universal properties of their magnetospheres. Analytic expressions are derived for the limiting form of the magnetosphere in the ...

    • Quasinormal quantization in de Sitter spacetime 

      Jafferis, Daniel Louis; Lupsasca, Alexandru Victor; Lysov, Vyacheslav; Ng, Gim Seng; Strominger, Andrew E. (Springer Nature, 2015)
      A scalar field in four-dimensional deSitter spacetime (dS4) has quasinormal modes which are singular on the past horizon of the south pole and decay exponentially towards the future. These are found to lie in two complex ...