Pulsed E plus or minus Annihilation gamma -Ray Line from a Crab-like Pulsar

Details Pulsed E plus or minus Annihilation gamma -Ray Line from a Crab-like Pulsar Pulsed E plus or minus Annihilation gamma -Ray Line from a Crab-like Pulsar

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...478..701z&link_type=abstract

Astrophysical Journal v.478, p.701

Astronomy and Astrophysics

Astronomy

19

Gamma Rays: Theory, Stars: Pulsars: Individual Name: Crab Nebula, Radiation Mechanisms: Nonthermal, Stars: Neutron

Scientific paper

Electron-positron pair production and annihilation within the magnetosphere of a gamma -ray pulsar such as the Crab are considered. Outer-magnetosphere accelerator models seem capable of giving both the 1040 s-1 e+/- pair annihilation rate and the narrow, gravitationally redshifted e+/- annihilation line shape in the Crab pulsar spectrum reported by the FIGARO collaboration. An essential feature is the expected formation of an electron-positron layer well above the pulsar surface, in which gravitational pull toward the star is balanced by cyclotron resonance scattering of polar cap X-rays. Applications to other gamma -ray pulsars with smaller spin-down powers than that of the Crab pulsar are also considered.

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