Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pabei..19..184c&link_type=abstract
Progress in Astronomy, Vol. 19, No. 2, p. 184 - 196 (2001). In: Proceedings for the First National Academic Conference of the Ch
Astronomy and Astrophysics
Astronomy
Gamma Rays: Theory, Pulsars, Neutron Stars
Scientific paper
We use a three-dimensional pulsar magnetosphere model to study the geometry of outer-magnetospheric gaps. The vertical size of the "outer gap" is first determined by a self-consistent model in which the outer gap size is limited by pair production from collisions of thermal photons produced from polar cap heating by backflow outer gap current with curvature photons emitted by gap accelerated charged particles. The transverse size of the outer gap is also determined by local pair production limits. In principle, there are two topologically disconnected outer gaps in the magnetosphere of a pulsar. Both incoming and outgoing particle flows are allowed. However, the emission morphologies produced by incoming particle flow is severely restricted by local pair production in the gap and the absorption of magnetic pair production near the star. From the three-dimensional structure of the outer gap and its local properties, we calculate the emission morphologies and phase-resolved spectra of Crab-like pulsars.
Cheng Kwong Sang
Zhang Lianchang
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