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      Exploiting simultaneous multi-frequency observations to probe polar-cap processes

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          Abstract

          Sub-pulse drifting has been regarded as one of the most insightful aspects of the pulsar radio emission. The phenomenon is generally explained with a system of emission sub-beams rotating around the magnetic axis, originating from a carousel of sparks near the pulsar surface (the carousel model). Since the observed radio emission at different frequencies is generated at different altitudes in the pulsar magnetosphere, corresponding sampling of the carousel on the polar cap differs slightly in magnetic latitude. When this aspect is considered, it is shown here that the carousel model predicts important observable effects in multi-frequency or wide-band observations. Also presented here are brief mentions of how this aspect can be exploited to probe the electrodynamics in the polar cap by estimating various physical quantities, and correctly interpret various carousel related phenomena, in addition to test the carousel model itself.

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          Author and article information

          Journal
          12 December 2017
          Article
          1712.04219

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          Custom metadata
          2 pages, 1 figure, Proceedings IAU Symposium No. 337 Pulsar Astrophysics - The Next 50 Years
          astro-ph.HE

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