Depolarisation of pulsar integrated pulse profiles

Details Depolarisation of pulsar integrated pulse profiles Depolarisation of pulsar integrated pulse profiles

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...100..107m&link_type=abstract

Astronomy and Astrophysics, vol. 100, no. 1, July 1981, p. 107-112.

Astronomy and Astrophysics

Astrophysics

23

Circular Polarization, Frequency Response, Linear Polarization, Polarization Characteristics, Pulsars, Stellar Radiation

Scientific paper

The rate of depolarization of the linear polarization of the average pulse profile is a function of pulsar period. Short period pulsars depolarize less rapidly and show a variation of depolarization rate across their pulse profiles. The trailing edge depolarizes more rapidly than the leading edge. This is paralleled by a front to back asymmetry of the total intensity profile. These latter effects are presumably due to distortion of the magnetosphere near the velocity of light cylinder. The predominant depolarization mechanism is apparently different from the long and short period pulsars. Randomization of the position angle of polarization during propagation in the weaker fields of the outer magnetosphere may account for the depolarization of the long period pulsars. An increased frequency of occurrence of orthogonally polarized radiation may be responsible for the depolarization of the short period pulsars. The majority of pulsars (more than 70% in this sample) show depolarization of their circular polarization at high frequency. There are indications that this is period dependent

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