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DC Field | Value | Language |
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dc.contributor.author | Suleymanova, S.A. | - |
dc.contributor.author | Izvekova, V.A. | - |
dc.contributor.author | Rankin, J.M. | - |
dc.contributor.author | Rathnasree, N. | - |
dc.date.accessioned | 2006-01-03T04:12:55Z | - |
dc.date.available | 2006-01-03T04:12:55Z | - |
dc.date.issued | 1998 | - |
dc.identifier.citation | Journal of Astrophysics and Astronomy, 1998, Vol. 19, p1-18. | en |
dc.identifier.issn | 0250-6335 | - |
dc.identifier.uri | http://hdl.handle.net/2289/1046 | - |
dc.description.abstract | The characteristics of the "burst" (B) mode and "quiescent" (Q) mode pulse sequences-long known from studies at or below 103 MHz-are identified at 430MHz for the first time. An 18-minute, polarimetric observation begins with a long B-mode sequence, which has a higher average intensity, regular drifting subpulses, and a preponderance of primary polarisation-mode radiation. An abrupt transition to a Q-mode sequence is then marked by a) weaker average intensity, but occasional very bright individual subpulses, b) a complete cessation of drifting subpulses, with disorganized subpulses now being emitted over a much wider longitude interval, and c) near parity between the primary and secondary polarisation modes, resulting in pronounced depolarisation, both of individual pulses and the average profile. Careful study, however, of profile changes before and after this mode change reveals slower variations which both anticipate the abrupt transition and respond to it. A slow attenuation of the intensity level of the dominant component is observed throughout the duration of the B-mode sequence, which then accelerates with the onset of the Q-mode sequence. This slow variation appears to represent a "pre-switching transition" process; and the combination of effects on slow and abrupt time scales are finally responsible for the formation of the characteristic B- and Q-mode average profiles. | en |
dc.format.extent | 1739838 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | Indian Academy of Sciences, Bangalore, India. | en |
dc.rights | Indian Academy of Sciences, Bangalore, India. | en |
dc.subject | Pulsars | en |
dc.subject | Mode changing | en |
dc.subject | Polarisation | en |
dc.title | Individual and integrated pulse properties of PSR B0943+10 involved in the mode-changing phenomenon | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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1998 JAA V19 p1.pdf | 18p. | 1.7 MB | Adobe PDF | View/Open |
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