Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.260..124m&link_type=abstract
Nature, vol. 260, Mar. 11, 1976, p. 124-126.
Physics
18
Particle Acceleration, Pulsars, Stellar Magnetic Fields, Stellar Rotation, Crab Nebula, Spin Dynamics, Stellar Mass Ejection, Stellar Motions, Supernova Remnants
Scientific paper
The veracity of various acceleration mechanisms proposed to explain the high velocities of pulsars is assessed on the basis of the relative orientation of the projected direction of the spin axis (S) and the observed direction of motion of the pulsar (V). The spin axis projected direction is obtained from the intrinsic angle of polarization of the radio emission at the center of the integrated pulse profile. The systematic sweep of the plane of the average polarization is attributed to the changing aspect of the projected magnetic field in the radiating region as the pulsar rotates, and the relation of the projected field direction and the plane of polarization is assumed constant. At pulse maximum, a constant difference between the projected magnetic field direction and the projected spin axis is assumed. Results obtained for numerous pulsars indicate that in most cases V and S do not coincide, in contrast to the prediction of the acceleration mechanism proposed by Harrison and Tademaru (1975). A sling shot acceleration mechanism or 'spin-aligned' ejection of pulsars from supernovae are more likely.
Morris Dave
Radhakrishnan Venkatesh
Shukre C.
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