Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...537..964c&link_type=abstract
The Astrophysical Journal, Volume 537, Issue 2, pp. 964-976.
Astronomy and Astrophysics
Astronomy
143
Gamma Rays: Theory, Stars: Pulsars: General, Stars: Magnetic Fields
Scientific paper
A three-dimensional pulsar magnetosphere model is used to study the geometry of outer magnetospheric gap accelerators, following seminal work of Romani and coworkers. The size of the outer gap is self-consistently limited by pair production from collisions of thermal photons from polar cap heating of backflow outer gap current with curvature photons emitted by gap-accelerated charged particles. In principle, there could be two topologically disconnected outer gaps. Conditions for local pair production such as local field line curvature, soft X-ray density, electric field, etc., support pair production inside an outer gap only between rin(φ) (the radius of the null surface at azimuthal angle φ) and rlim(φ)~6rin(φ=0)<
Cheng Kwong Sang
Ruderman Malvin
Zhang Lianchang
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