Annihilation radiation from a power-law distributed electron-positron plasma on the ground Landau level - The case of low magnetic fields

Details Annihilation radiation from a power-law distributed electron-positron plasma on the ground Landau level - The case of low magnetic fields Annihilation radiation from a power-law distributed electron-positron plasma on the ground Landau level - The case of low magnetic fields

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.192..175k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 192, no. 2, June 1992, p. 175-200.

Statistics

Computation

Annihilation Reactions, Electron-Positron Plasmas, Gamma Ray Bursts, Interstellar Magnetic Fields, Computational Astrophysics, Gravitational Effects, Linear Polarization, Photons, Polarized Radiation, Power Spectra

Scientific paper

The intensity, polarization, and cooling rate of the two-photon annihilation radiation are studied for the case of a 1D power-law distribution of electrons and positrons occupying the ground Landau level in a magnetic field of 10 exp 10 to 10 exp 12 G. Power law distributions are shown to generate power-law spectra of the annihilation radiation low and high energies. The annihilation spectra at theta = 0 show the largest blueshifts of their maxima and the hardest high-energy tails. The blueshifts reduce and the hard tails steepen with increasing theta. Annihilation features and power-law-like hard tails observed in many gamma-ray burst spectra may be associated with the annihilation radiation of the magnetized power-law distributed plasma near neutron stars. Comparison of the observed and theoretical spectra permits the power-law index of the e(-) e(+) distribution and the gravitational redshift factor in the radiation region to be estimated.

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