Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981plap.rept..273a&link_type=abstract
In ESA Plasma Astrophys. p 273-289 (SEE N82-20030 10-88)
Astronomy and Astrophysics
Astrophysics
11
Flux Pumps, Light Emission, Magnetohydrodynamic Flow, Pair Production, Particle Acceleration, Photons, Polarized Electromagnetic Radiation, Pulsars, Radiative Transfer, Field Emission, Radio Bursts, Stellar Models
Scientific paper
Particle acceleration and photon emission in the polar field lines of a pulsar are considered. Observations of pulsar pulse, subpulse and micropulse morphology, spectra and polarization, as well as high frequency radiation are reviewed and used to suggest a steady streaming model with pair creation as the seat of the emission phenomenon. The energetics of polar beam flow are described with emphasis on acceleration in a slot gap. A possible global model of the magnetosphere is outlined. The plasma content of the flow is described, then used to discuss several transfer processes which may be associated with subpulse morphology and polarization and with the formation of micropulses. Various ideas about possible emission processes are discussed with emphasis on emission from shear flows in the boundary layers of the pair plasma flow. A model of the origin of marching subpulses is suggested, involving a rotating drift wave over the polar cap.
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