Resonant inverse Compton scattering above polar caps: Gap acceleration efficiency for young pulsars

Qinghuan Luo and R. J. Protheroe, PASA, 15 (2), 222
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Resonant inverse Compton scattering above polar caps: Gap acceleration efficiency for young pulsars

Qinghuan Luo and R. J. Protheroe

Department of Physics and Mathematical Physics,
The University of Adelaide, SA 5005

Abstract:

It is shown that for moderately hot polar caps (with effective temperature of tex2html_wrap_inline360 K), the efficiency of polar gap acceleration is lower compared to the case in which the polar caps are relatively cool and inverse Compton scattering plays no role in controlling the gap. For young pulsars with superstrong magnetic fields (tex2html_wrap_inline362) and hot polar caps (with temperature of tex2html_wrap_inline364), because of the energy loss of electrons or positrons due to resonant inverse Compton scattering in the vicinity of polar caps, pair cascades occur at distances further away from the polar cap, and in this case, we have a relatively high acceleration efficiency with ions carrying most of the particle luminosity.

Keywords: acceleration of particles - pulsars: general - star: neutron - scattering



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