D. Kumar, R. T. Gangadhara
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.
View original:
http://arxiv.org/abs/1202.1921
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