Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206..831j&link_type=abstract
Astrophysical Journal, vol. 206, June 15, 1976, pt. 1, p. 831-841.
Astronomy and Astrophysics
Astrophysics
53
Atmospheric Models, Pulsars, Stellar Magnetic Fields, Stellar Models, Stellar Rotation, Alignment, Axes Of Rotation, Magnetohydrodynamic Flow, Neutron Stars, Radial Velocity, Stellar Atmospheres
Scientific paper
A model for the plasma atmosphere about a rotating magnetized neutron star with aligned magnetic and rotational axes is developed using a gedanken experiment in order to avoid considering at one time all of the phenomena produced by the extreme parameters associated with real pulsars. In this approach, the angular velocity of the star is adiabatically increased in time, with the two axes aligned so that no dependence on the toroidal variable is introduced. The conclusions which appear to yield a consistent model are: (1) the star acquires a net charge that produces a monopole electric field which dominates the dipole magnetic field at large distances and causes particles emitted at the polar caps to cross the magnetic surface at these distances, forming a current loop between the caps and the polar annuli; (2) the primary current loop is not connected to the nebula and produces no energy loss due to particle emission into it; (3) a steady-state (possibly turbulent) component of the atmosphere exists around a force-free surface which forms a dome over the polar cap; (4) the dome will have a continuous influx from primary beam particles, which are trapped due to their radiation loss; and (5) the toroidal drift velocity is not corotational, which is consistent with closed magnetic-field lines.
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