Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2012-02-09
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
20 pages of text, 10 figures, submitted to ApJ
Scientific paper
We have developed a model for the polarization of curvature radiation for pulsars by taking into account the polar cap induced perturbation on the nonrotating (slowly rotating) dipolar magnetic field, where the rotation effects such as aberration and retardation can be ignored. We have simulated a set of typical pulse profiles to understand the role of induced magnetic field on radio emission of pulsars, and found to be significantly influencing the profile structure and polarization. Our model indicates that the intensity components and the polarization angle inflection point can get shifted to either leading or 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 an evidence for the origin of symmetric type circular polarization in addition to antisymmetric type. Our model predicts for a stronger trailing component compared to that on leading side of a given cone.
Gangadhara R. T.
Kumar Dinesh
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