Gamma-ray bursts from magnetospheric plasma oscillations

Details Gamma-ray bursts from magnetospheric plasma oscillations Gamma-ray bursts from magnetospheric plasma oscillations

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351..601m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 601-605. Research supported by the Alfred P. Sloan

Astronomy and Astrophysics

Astrophysics

13

Cosmic Plasma, Gamma Ray Bursts, Particle Acceleration, Plasma Oscillations, Relativistic Plasmas, Stellar Magnetospheres, Compton Effect, Continuity Equation, Photons

Scientific paper

Relativistic, (neutron star) magnetospheric plasma oscillations, damped by inverse Compton scatterings with the ambient radiation field, can account for the energetics, decay time scale, and spectra of typical gamma-ray bursts (GRBs). The dissipation time scale tau depends on the energy of the perturbation, and that tau of about 1 sec for W(burst) is about 10 to the 36th ergs. Several plausible mechanisms for 'loading' the magnetosphere, all of which might be contributing to the GRB phenomenon are discussed. The soft photon source is likely due to backwarming of the reprocessing boundary (i.e., the stellar surface and possibly an accretion disk) by the incipient gamma-rays, which is consistent with the Ginga observation of a slowly decaying, low-energy X-ray component in some bursts.

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