Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..675j&link_type=abstract
Astrophysical Journal, Part 1, vol. 222, June 1, 1978, p. 675-688.
Astronomy and Astrophysics
Astrophysics
19
Magnetohydrodynamic Flow, Pulsars, Stellar Atmospheres, Stellar Magnetic Fields, Stellar Rotation, Stellar Winds, Electric Fields, Magnetic Dipoles, Magnetically Trapped Particles, Orthogonality, Self Consistent Fields
Scientific paper
The dominant guiding-center motions of particles in the vacuum near-field region of a rotating magnetized charged neutron star with an arbitrary angle (chi) between the rotational and magnetic axes are investigated in order to determine qualitative features of the atmosphere formed by the rotating magnetic field and its associated electric field. The vacuum field structure near the star is considered, with particular attention given to the acceleration along the magnetic field and the emission features at the stellar surface as a function of stellar charge. Details of the orthogonal case are discussed, showing the nature of the force-free surface about which the atmosphere tends to form as well as the vortical and nonvortical drift patterns produced by E x B drift. The case of arbitrary orientations is examined, the polar emission region to the nebula and the stellar charge are estimated on the basis of an emission cylinder of given radius, and the qualitative structure of the atmosphere is described. An estimate is given for the maximum value of the absolute value of chi - pi/2 for which there is a particle flux to the nebula.
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