Open AccessThe topology and polarization of sub‐beams associated with the ‘drifting’ sub‐pulse emission of pulsar B0943+10 – II. Analysis of Gauribidanur 35‐MHz observations
Author(s) -
Asgekar Ashish,
Deshpande Avinash A.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2001.04664.x
Subject(s) - pulsar , physics , astrophysics , polarization (electrochemistry) , polar cap , context (archaeology) , pulse (music) , polar , astronomy , optics , paleontology , chemistry , detector , biology
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.