Pulsar geometries. III - The hollow-cone model

Astronomy and Astrophysics – Astrophysics

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Neutron Stars, Pulsars, Stellar Models, Stellar Rotation, Axes Of Rotation, Cones, Frequency Distribution, Geometry, Magnetic Poles, Stellar Radiation

Scientific paper

Previously presented relations between observable and geometrical quantities relating to neutron stars are extended to include the hollow-cone case, which is attractive on physical grounds. The model by Ruderman and Sutherland (1975), with its specific predictions, has been selected for a detailed comparison of theory and observation, in particular with respect to organized subpulse drifting and objects with double-humped integrated profiles. It is found that the hollow-cone model is able to reproduce qualitatively the major trends of observations but that some crucial aspects of Ruderman and Sutherland's model are at variance with fact and require refinement, especially the predicted frequency dependences. Specific suggestions about an improvement of the physical theory are made.

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