The origin of nulls, mode changes and timing noise in pulsars

Details The origin of nulls, mode changes and timing noise in pulsars The origin of nulls, mode changes and timing noise in pulsars

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200.1081j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Sept. 1982, p. 1081-1089.

Astronomy and Astrophysics

Astronomy

8

Neutron Stars, Pulsars, Radio Astronomy, Stellar Radiation, Magnetic Field Configurations, Magnetic Flux, Polar Caps, Stellar Magnetic Fields, Stellar Temperature, Surface Temperature

Scientific paper

A solvable polar cap model obtained previously has normal states which may be associated with radio emission, and null states. The solutions cannot be time-independent; the neutron star surface temperature T and mean surface nuclear charge Z are both functions of time. The normal and null states and the transitions between them, form closed cycles in the T-Z plane. Normal-null transitions can occur inside a fraction of the area of the neutron star surface intersected by open magnetic flux lines. The fraction increases with pulsar period and becomes unity when the pulsar nears extinction. Frequency noise, mode changes and pulse nulls have a common explanation in the transitions.

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