Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....79....8p&link_type=abstract
Astronomy and Astrophysics, vol. 79, no. 1-2, Oct. 1979, p. 8-13.
Astronomy and Astrophysics
Astrophysics
20
Beams (Radiation), Pulsars, Radiation Distribution, Stellar Radiation, Angular Distribution, Magnetic Poles, Neutron Stars, Stellar Models, Width
Scientific paper
The distributions of apparent beamwidths (widths of the integrated pulse-profiles compared with the periods) for a sample of 199 pulsars are analyzed. The distributions obtained for groups of pulsars with different periods appear to be very similar. This suggests that pulsar emission originates rather close to a neutron star. Thus the magnetic-pole models, with an emission beam of a size roughly similar for all pulsars, are preferred. This hypothesis is shown to be consistent with observations only if the full angular beamwidth is not greater than 10-15 deg and small angles between the rotation and magnetic-dipole axes are preferred. The requirements that any light-cylinder model should fulfill to be consistent with pulse-width observations are also discussed.
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