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Related Experiment Videos

Electron-positron outflow from black holes.

M H van Putten1

  • 1Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Physical Review Letters
|October 6, 2000
PubMed
Summary
This summary is machine-generated.

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Rapidly spinning black holes can power gamma-ray bursts (GRBs) by generating outflows. This research proposes a new model for the central engine of these cosmic explosions, linking black hole properties to observed GRB emissions.

Area of Science:

  • Astrophysics
  • Black Hole Physics
  • High-Energy Astronomy

Background:

  • Cosmological gamma-ray bursts (GRBs) are the most luminous transient events observed.
  • The central engine powering GRBs, potentially involving low-mass black holes, remains poorly understood.
  • Black hole spin interacting with magnetic fields is a candidate mechanism for energy extraction.

Purpose of the Study:

  • To investigate the role of black hole spin in generating outflows relevant to GRBs.
  • To provide a theoretical framework connecting black hole properties to GRB emission characteristics.
  • To propose a viable central engine model for GRB fireball simulations.

Main Methods:

  • Theoretical modeling of charged particle behavior near a rotating black hole in an external magnetic field.

Related Experiment Videos

  • Derivation of equations for outflow generation and emission based on black hole mass and spin.
  • Calculation of normalized isotropic emission and half-opening angle.

    • Main Results:

    • A rapidly rotating black hole produces outflow from electrostatic equilibrium.
    • Normalized isotropic emission is estimated as approximately 10(48)(B/B(c))(2)(M/7M)(2)sin(2) theta erg/s.
    • The half-opening angle of the outflow is constrained by theta >= sqrt[B(c)/3B].

    Conclusions:

    • Black hole spin in a magnetic field can generate outflows consistent with GRB requirements.
    • The proposed outflow mechanism offers a potential input for GRB fireball models.
    • This work advances the understanding of GRB central engines and their progenitors.