The topology and polarization of sub-beams associated with the 'drifting' sub-pulse emission of pulsar B0943+10 – II. Analysis of Gauribidanur 35-MHz observations |
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| Authors: | Ashish Asgekar Avinash A Deshpande |
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| Institution: | 1Raman Research Institute, Bangalore 560 080, India; 2Joint Astronomy Programme, Indian Institute of Science, Bangalore 560 012, India |
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| Abstract: | In the previous paper of this series, Deshpande & Rankin reported results regarding the sub-pulse drift phenomenon in pulsar B0943+10 at 430 and 111 MHz. This study has led to the identification of a stable system of sub-beams circulating around the magnetic axis of this star. Here, we present a single-pulse analysis of our observations of this pulsar at 35 MHz. The fluctuation properties seen at this low frequency, as well as our independent estimates of the number of sub-beams required and their circulation time, agree remarkably well with the reported behaviour at higher frequencies. We use the 'cartographic' transform mapping technique developed by Deshpande & Rankin in Paper I to study the emission pattern in the polar region of this pulsar. The significance of our results in the context of radio emission mechanisms is also discussed. |
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| Keywords: | radiation mechanisms: non-thermal pulsars: general pulsars: individual: B0943+10 |
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