Resonant Compton scattering in models of gamma-ray burst sources: 2, Numerical modeling

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:6304608

Vitello, P ^[1]; Dermer, C D ^[2]

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1. Lawrence Livermore National Lab., CA (USA). Physics Dept.
2. Lawrence Livermore National Lab., CA (USA). Physics Dept. California Univ., Berkeley, CA (USA). Space Sciences Lab.

We numerically calculate photon spectra produced from the resonant Compton scattering of blackbody photons by a beam of relativistic electrons and positrons. The beam is assumed to be directed radially outward along the magnetic axis of a highly magnetized neutron star. We assume a dipole magnetic field geometry, and include the effects of magnetic Compton-scattering energy losses on the particles in the beam during transport. A range of surface blackbody radiation temperatures near 1 keV and magnetic field strengths near 2 {times} 10{sup 12} Gauss are studied for power-law electron and positron source functions. If the beam is injected with a power law distribution with energy distribution index {Gamma} and low-energy cutoff {gamma}{sub {asterisk}}, then the calculated Compton-scattered photon spectra are similar to observed gamma-ray burst spectra, with a spectral index {alpha} which breaks from {alpha} {congruent} 1 to {alpha} {congruent} {Gamma}. 10 refs., 4 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6304608
• Report Number(s): UCRL-JC-105323-Pt.2; CONF-9007101--4-Pt.2; ON: DE91005268
• Country of Publication: United States
• Language: English

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