Influence of the polar cap current on pulsar polarization
arXiv:1202.1921 · doi:10.1088/0004-637X/754/1/55
Abstract
We have developed a model for the polarization of curvature radiation by taking into account the polar-cap-current induced perturbation on the dipolar magnetic field. We present the effects of the polar cap current on the pulsar radio emission in an artificial case when the rotation effects, such as aberration and retardation, are absent. Our model indicates that the intensity components and the polarization angle inflection point can be shifted to either the leading or the trailing side depending upon the prevailing conditions in the viewing geometry, the non-uniformity in source distribution (modulation), and the polar cap-current-induced perturbation. Also, we find evidence for the origin of symmetric-type circular polarization in addition to the antisymmetric type. Our model predicts a stronger trailing component compared to that on the leading side of a given cone under some specific conditions.
20 pages of text, 11 figures, Revised version with the correction to abscissa of the left column panels in Figure 3, and inclusions of Figure 11 and discussions on the effect of ExB drift. The article is published in ApJ
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Cited by in corpus (5)
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- Neutron Star Physics in the Square Kilometer Array Era : An Indian Perspective
- Role of rotation and polar cap current on pulsar radio emission and polarization
- The geometry of a radio pulsar beam