Physics – Condensed Matter – Superconductivity
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..63....3k&link_type=abstract
Astrophysics and Space Science, vol. 63, no. 1, June 1979, p. 3-17.
Physics
Condensed Matter
Superconductivity
2
Neutron Stars, Pulsars, Radio Emission, Radio Sources (Astronomy), Stellar Models, Superconductivity, Josephson Junctions, Magnetospheres, Polarization Characteristics, Pulse Amplitude Modulation, Reaction Kinetics
Scientific paper
A pulsar radio emission mechanism is proposed whereby the quasi-steady eddy current of protons relative to electrons in the superconducting mantle of a neutron star, which current is caused by the intrinsic magnetic field, generates the radio emission by means of an unsteady Josephson effect. This emission, propagating in a magnetoactive medium, emerges from a thin layer of the optically 'thick' mantle into the magnetosphere via fissures in the crust. As a result, radio 'hot spots' are formed on the star's surface, and the directivity pattern of polarized radiation is formed near the magnetic poles; the directivity-pattern cross section gives the observed pulse structure. Due to specific properties of this mechanism, variations in the quasi-steady current are transformed into amplitude-frequency variations in the radiation spectrum. In the proposed model, this explains observed variations in pulsar spectral fine structure, pulse amplitude, and spectral index, as well as the interrelation of these variations.
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