Particle Acceleration in High Field Pulsars and Magnetars

Details Particle Acceleration in High Field Pulsars and Magnetars Particle Acceleration in High Field Pulsars and Magnetars

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.s7006h&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

We investigate space-charge limited flow acceleration and its consequences in pulsars having strong magnetic fields near and above the critical field strength. In this model an accelerating electric field is present above the neutron star polar caps due to inertial frame-dragging. In such superstrong fields, the dominant processes are resonant Compton scattering, pair creation and photon splitting. In pulsars having lower magnetic fields, one-photon pair creation produces a pair front at low altitudes. In high-field pulsars, photon splitting may inhibit pair production at low altitudes, moving the pair front to higher altitudes where the field is lower. The accelerating particles will also lose energy by resonant Compton scattering of soft thermal photons from the neutron star surface. We explore the existence and location of pair formation fronts and the energy loss and radiation due to resonant Compton scattering in high-field pulsars. The production by Compton scattering of the power law component seen in the quiescent spectrum of Anomalous X-Ray Pulsars and Soft Gamma-Ray Repeaters will be discussed.

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