Potential drops above pulsar polar caps - Ultrarelativistic particle acceleration along the curved magnetic field

Details Potential drops above pulsar polar caps - Ultrarelativistic particle acceleration along the curved magnetic field Potential drops above pulsar polar caps - Ultrarelativistic particle acceleration along the curved magnetic field

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..297s&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, May 15, 1978, p. 297-316. Research supported by the Miller Foundation

Astronomy and Astrophysics

Astrophysics

110

Electric Potential, Particle Acceleration, Polar Caps, Pulsars, Relativistic Particles, Stellar Magnetic Fields, Green'S Functions, Lines Of Force, Magnetic Field Configurations, Magnetohydrodynamic Flow, Neutron Stars, Space Charge, Steady Flow, Stellar Models

Scientific paper

The paper calculates the acceleration of a nonneutral stream of charged particles from the surface of an isolated rotating magnetized neutron star in the case where the particle stream flows along the open field lines of a curved poloidal magnetic field. It is shown that very large electrostatic potential drops can occur in steady unidirectional space-charge-limited flow along the curved open field lines. The explicit incorporation of magnetic field line curvature is the essential element leading to this new result, assuming that all the charges are supplied by emission from the surface. It is emphasized that the current flow and charge density are unique if all of the assumptions are met, with the result that the accelerating electric field near the stellar surface is quite small compared to the vacuum field.

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