Radio pulsar disk electrodynamics

Details Radio pulsar disk electrodynamics Radio pulsar disk electrodynamics

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...266..188m&link_type=abstract

Astrophysical Journal, Part 1, vol. 266, Mar. 1, 1983, p. 188-200.

Physics

21

Electrodynamics, Pulsars, Radio Stars, Stellar Models, Auroral Zones, Energy Dissipation, Magnetic Stars, Neutral Sheets, Neutron Stars, Polar Caps, Stellar Magnetic Fields, Stellar Mass Accretion, Stellar Rotation

Scientific paper

Macroscopic physics are discussed for the case of a disk close to an isolated, magnetized, rotating neutron star that acts as a Faraday disk dynamo, while the disk acts as both a load and a neutral sheet. This sheet allows the polar cap current to return to the neutron star, splitting a dipolar field into two monopolar halves. The dominant energy loss is from the stellar wind torque, and the next contribution is dissipation in the auroral zones, where the current returns to the star in a 5 cm-thick sheet. The disk itself may be a source of visible radiation comparable to that in pulsed radio frequency emission. As the pulsar ages, the disk expands and narrows into a ring which, it is suggested, may lead to a cessation of pulsed emission at periods of a few sec.

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