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A study of polarisation modes in PSR 0823+26

Published online by Cambridge University Press:  12 April 2016

Joanna M. Rankin  and
N. Rathnasree
Joanna M. Rankin
Affiliation:
University of Vermont, Burlington, VT-05405, USA
N. Rathnasree
Affiliation:
University of Vermont, Burlington, VT-05405, USA

Extract

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We explore the detailed polarisation behaviour of pulsar 0823+26 using the technique of constructing partial “mode-separated” profiles corresponding to the primary and secondary polarisation modes. The characteristics of the two polarisation modes in this pulsar are particularly interesting, both because they are anything but orthogonal (Backer & Rankin 1980), and because the secondary mode exhibits structure seen neither in the primary mode nor in the total profile.

Using the model-angle method of polarisation-mode deconstruction (Rankin et. al. 1989; Cordes et. al. 1978), we can take the following representation of the single-vector model to define the respective primary and secondary-mode PA traverses

where χ is the PA, ϕ the longitude, the maximum PA sweep rate, and A a constant which can be computed from the total PA traverse, χc between reference longitudes ±ϕc as

and which is formally equal to sin ζ/ tan α, where α and ζ are the angles that the magnetic axis and the sight line make with the rotation axis, respectively.

Type
Part 4 Radio Properties
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 263 - 264
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Backer, D.C., & Rankin, J.M. 1980, ApJS, 42, 143 CrossRefGoogle Scholar
Cordes, J.M., Rankin, J.M., & Backer, D.C. 1978, ApJ, 223, 961 CrossRefGoogle Scholar
Rankin, J.M., Campbell, D.B., & Backer, D.C. 1974, ApJ, 188, 609 CrossRefGoogle Scholar
Rankin, J.M. & Rathnasree, N. 1996, JAA, in pressGoogle Scholar