A superdispersion delay of the meter-wave pulses of PSR 0809 + 74

Details A superdispersion delay of the meter-wave pulses of PSR 0809 + 74 A superdispersion delay of the meter-wave pulses of PSR 0809 + 74

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pazh...11...94s&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 11, Feb. 1985, p. 94-100) Soviet Astronomy Letters (ISSN 0360-0327), vol. 11, Jan.-Feb.

Astronomy and Astrophysics

Astronomy

6

Pulsars, Radio Waves, Stellar Magnetic Fields, Wave Dispersion, Earth Magnetosphere, Interplanetary Medium, Wave Propagation

Scientific paper

The integrated pulse profile of the pulsar 0809 + 74 exhibits a time delay at meter wavelengths in excess of that attributable to dispersion in the interstellar medium. This 'superdisperion' delay increases sharply toward lower frequencies; observations at Pushchino show that it reaches abut 150 msec at a frequency of 30 MHz. The effect is interpreted as a bending of the pulsar's effective radiation cone, most likely due to twisting of the magnetic field lines through electromagnetic braking of the rotation. The low-frequency (less than about 30 MHz) emission would then be generated high in the magnetosphere, at levels greater than about 10 to 9th cm, comparable with the light-cylinder radius.

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