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Testing the relationship between nulling, drifting and mode-changing

Published online by Cambridge University Press:  20 March 2013

Bhal Chandra Joshi
Bhal Chandra Joshi*
Affiliation:
National Centre for Radio Astrophysics (TIFR), P. Bag 3, Ganeshkhind, Pune - 411007, India email: bcj@ncra.tifr.res.in
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Abstract

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Recent observations, suggesting that subpulse drifting, pulse nulling and profile mode-changes are related phenomena, are reviewed and it is argued that these are associated with global changes in the magnetosphere. Long simultaneous multi-frequency observations are useful to test this premise as is illustrated by the preliminary results from a recent study of PSR B0031–07, B0809+74 and B2319+60. Such observations for a larger sample of pulsars will be useful to constrain recent models, invoking global changes in the pulsar magnetosphere, proposed to explain observations demonstrating association of spin-down changes with profile mode-changes.

Keywords

radiation mechanisms: generalpulsars: generalpulsars: B0031–07pulsars: B0809+74pulsars: B2319+60
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. 414 - 416
Copyright
Copyright © International Astronomical Union 2013

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