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Elementary radiation patterns in pulsar profiles

Published online by Cambridge University Press:  20 March 2013

Jarosław Dyks  and
Bronisław Rudak
Jarosław Dyks
Affiliation:
Nicolaus Copernicus Astronomical Center, Toruń, Poland, email: [email protected], [email protected]
Bronisław Rudak
Affiliation:
Nicolaus Copernicus Astronomical Center, Toruń, Poland, email: [email protected], [email protected]
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Abstract

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Highly symmetric double features observed in averaged pulsar profiles can be interpreted as the imprint of microscopic radiation beam characteristic of radiative mechanism operating in pulsar magnetosphere. The data put strong constraints on the possible radiation patterns, excluding entire classes of mechanisms, such as those based on parallel acceleration, or those that have complicated beams. Instead, several properties of double features (such as their symmetry, depth, shape, merging rate, large polarisation degree, and the association with bifurcated emission components) are consistent with the extraordinary-mode part of the curvature radiation beam. This shows that double notches are a clear signature of the curvature radiation process. We show that even with the emission process fixed, detailed modelling of double features remains a rather sophisticated and demanding task.

Keywords

pulsars: generalpulsars: individual (B1929+10, J0437-4715)radiation mechanisms: nonthermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S291: Neutron Stars and Pulsars: Challenges and Opportunities after 80 years , August 2012 , pp. 301 - 306
Copyright
Copyright © International Astronomical Union 2013

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