Orthogonal mode emission in geometric models of pulsar polarisation

Backer, D. C.; Rankin, John; Campbell, D. B.

doi:10.1038/263202a0

Cited by 59 publications

(41 citation statements)

References 7 publications

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“…The single-pulse observations have demonstrated that for each of the orthogonal modes the position angle variations roughly follow the predictions of the rotating-vector model (Backer et al 1976), while the switching between the modes is a stochastic process (Cordes et al 1978). …”

Section: Observational Evidence For Orthogonally Polarized Modesmentioning

confidence: 99%

On the origin of orthogonal polarization modes in pulsar radio emission

Petrova

2001

A&A

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Abstract. This paper is devoted to studying the conversion of ordinary superluminous waves into extraordinary waves in an ultrarelativistic highly magnetized plasma of pulsars. The conversion appears to take place in the region of quasi-longitudinal propagation with respect to the magnetic field. Although the propagation of waves in pulsar magnetospheres is generally quasi-transverse, due to refraction the wave vector can for a short while become nearly aligned with the ambient magnetic field. As a result of the conversion, the originally ordinary wave turns into two waves, the ordinary and extraordinary. It is found that at pulsar conditions the conversion of the ordinary waves can be significant, i.e. a considerable part of the energy can be transmitted to the extraordinary waves. The process is suggested to underlie the observed transitions between the orthogonal polarization states in pulsar radiation. The connection of conversion with magnetospheric refraction implies a number of observational consequences which agree well with the observed features of the orthogonally polarized modes. In particular, it becomes possible to explain both the longitudinal location of the prominent orthogonal transitions and the high-frequency depolarization of pulsar radiation. Further polarization evolution of the natural waves resulting from the conversion is investigated as well. It is found that the polarization-limiting effect can account for both the change in the sense of circular polarization during the orthogonal transitions and the non-orthogonality of the observed modes. It is shown that any technique of mode separation should allow for the consequences of the polarization-limiting effect.

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Section: Observational Evidence For Orthogonally Polarized Modesmentioning

confidence: 99%

On the origin of orthogonal polarization modes in pulsar radio emission

Petrova

2001

A&A

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“…Application to Pulsar Radio Emission Observations show that emission in orthogonal modes is a characteristic property of pulsar radio emission (Manchester et al 1975, Backer et al 1976. The orthogonality appears in the integrated profile as well as in individual subpulses and between consecutive subpulses.…”

Section: The Properties Of the Wave Modesmentioning

confidence: 99%

The Natural Wave Modes in a Pulsar Magnetosphere

Melrose

Stoneham

1977

Publ. Astron. Soc. Aust.

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“…Mean pulse profiles of pulsars exhibit great stability but there are large morphological differences from pulsar to pulsar (Backer 1976;Morris et al 1981;Rankin 1983;Lyne & Manchester 1988;Seiradakis et al 1995). This fact has become the basis for a classification system first proposed by Huguenin et al (1971) and finally developed by Rankin (1983).…”

Section: Introductionmentioning

confidence: 99%

Pulse shapes of radio pulsars at 4.85 GHz

Kijak

Krämer

Wielebinski

et al. 1998

Astron. Astrophys. Suppl. Ser.

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Abstract. We present pulse shapes of 87 pulsars at 4.85 GHz. Pulse widths and flux densities are measured. The frequency dependence of the profile shape and the pulse width is discussed. Our data base has been combined with other published data to generate flux spectra between 1.4 GHz and 5 GHz. The mean flux spectral index has a value −1.9. Our analysis shows that pulsar emission spectra are steeper at higher frequencies.

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Orthogonal mode emission in geometric models of pulsar polarisation

Cited by 59 publications

References 7 publications

On the origin of orthogonal polarization modes in pulsar radio emission

On the origin of orthogonal polarization modes in pulsar radio emission

The Natural Wave Modes in a Pulsar Magnetosphere

Pulse shapes of radio pulsars at 4.85 GHz

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