Pulsar nulling and drifting subpulse phase memory

Filippenko, A.V.; Radhakrishnan, V.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/1388

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DC Field	Value	Language
dc.contributor.author	Filippenko, A.V.	-
dc.contributor.author	Radhakrishnan, V.	-
dc.date.accessioned	2006-06-28T06:29:57Z	-
dc.date.available	2006-06-28T06:29:57Z	-
dc.date.issued	1982-12	-
dc.identifier.citation	Astrophysical Journal, 1982, Vol.263, p828-834	en
dc.identifier.issn	0004-637X	-
dc.identifier.issn	1538-4357 (online)	-
dc.identifier.uri	http://hdl.handle.net/2289/1388	-
dc.description.abstract	A qualitative analysis is presented to account for the nulling phenomena observed pulsar radio emissions, which also feature an associated phase memory. The problem is that the radio signals are present in the form of a subpulse phase which is nulled for a fixed period, then return exactly in phase with the drifting subpulses occurring before the null. The discussion is limited to the Ruderman and Sutherland (1975) model and its modifications. Considering only old pulsars, it is argued that the dot product of the vectors E and B in the gaps under plasma flux tubes is higher than present along neighboring field lines outside the tubes. The nulling feature is then a manifestation of a continuous discharge in the polar gap of the pulsars instead of a cessation of sparking. The absence of radio emissions during nulling is then the lack of coherent structure. Mode changing arises due to the changing of certain regions of the polar gaps from active to nulling conditions, and from nulling to active states.	en
dc.format.extent	1322836 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	The University of Chicago Press for the American Astronomcial Society	en
dc.relation.uri	http://adsabs.harvard.edu/cgi-bin/bib_query?1982ApJ...263..828F	en
dc.rights	(1982) by the American Astronomical Society. Scanned images provided by the NASA ADS Data System.	en
dc.subject	Magnetohydrodynamics	en
dc.subject	Pulsars	en
dc.subject	Radio astronomy	en
dc.subject	Stellar radiation	en
dc.subject	Coherent electromagnetic radiation	en
dc.subject	Electromagnetic pulses	en
dc.subject	Sparks	en
dc.title	Pulsar nulling and drifting subpulse phase memory	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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