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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/5792

Title: Influence of the polar cap current on pulsar polarization
Authors: Dinesh Kumar
Gangadhara, R. T
Keywords: Polarization
Pulsars: general
Radiation mechanisms: non-thermal
Issue Date: 20-Jul-2012
Publisher: IOP Publishing
Citation: The Astrophysical Journal, Vol. 754, No. 1, 55
Abstract: We have developed a model for the polarization of curvature radiation by taking into account the polar-cap-currentinduced 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.
Description: Open Access
URI: http://hdl.handle.net/2248/5792
ISSN: 0004-637X
Alternative Location: http://dx.doi.org/10.1088/0004-637X/754/1/55
Copyright: © IOP Publishing
Appears in Collections:IIAP Publications

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