Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasj...52..645h&link_type=abstract
Publications of the Astronomical Society of Japan, v.52, p.645-657.
Astronomy and Astrophysics
Astronomy
9
Gamma-Rays: Theory, Magnetic Field, Stars: Neutron
Scientific paper
We consider the gamma -ray emissions from an outer-magnetospheric gap around a rotating neutron star. Migratory electrons and positrons are accelerated by the electric field exerted in the gap to radiate copious gamma -rays via a curvature process. Some of these gamma -rays materialize as pairs within the gap by colliding with the X-rays, leading to a pair-production cascade. The replenished charges partially screen the original acceleration field, which is self-consistently solved from the Poisson equation for the electrostatic potential. By considering the gamma -ray spectrum explicitly, we compute the pair-production rate in the gap to solve the Boltzmann equations for gamma -rays, together with the continuity equations for particles and the Poisson equation. It is demonstrate that the pulsed emission above 5 TeV due to the inverse Compton scatterings could not be detected by the current ground-based telescopes for ordinary pulsar parameters.
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