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http://hdl.handle.net/2289/3555| Title: | Revisiting the rich sub-pulse patterns of B1237+25: Preliminary results |
| Authors: | Maan, Yogesh Deshpande, A.A. |
| Keywords: | Pulsars Neutron stars Emission Ionospheric electromagnetic wave propagation |
| Issue Date: | 2008 |
| Publisher: | The American Institute of Physics |
| Citation: | 40 years of pulsars - millisecond pulsars, magnetars and more. AIP conference proceedings Vol. 983. Eds. C G Bassa |
| Abstract: | “Sub-pulse drifting”, one of the rich phenomena exhibited by many pulsars, have been suggested ([8], Ruderman and Sutherland, hereafter RS) as representing a system of sparks circulating around the magnetic axis in the acceleration zone of the star. Although pulse `drift' sequences have been studied for a number of pulsars, only in a few cases (i.e, B0943+10 & B0834+06) have the underlying patterns been mapped so far, revealing a well organized system of emission sub-beams and providing a strong support to the R&S model of circulating sparks. The well-known bright pulsar B1237+25, with its multi-component profile resulting from a special viewing geometry combined with its rich variety in pulse-to-pulse fluctuations, represents a challenging case for exploring the underlying circulation pattern. We present preliminary results of our analysis on a number of pulse-sequences from this object, with a view to investigate the following:1. Are the sub-beam patterns in the two presumed conal rings correlated?2. If yes, are the corresponding sub-beam patterns in the two conal rings offset relative to each other in magnetic azimuth?3. Can the mode-changing phenomenon be understood as a result of some systematic feature in sub-beam patterns?4. Core component: Really a “core” or just another conal ring of suitably small radius? |
| Description: | Open Access. |
| URI: | http://hdl.handle.net/2289/3555 |
| ISSN: | E-ISSN: 1551-7616 P-ISSN: 0094-243X |
| Alternative Location: | http://adsabs.harvard.edu/abs/2008AIPC..983..103M http://dx.doi.org/10.1063/1.2900114 |
| Copyright: | 2008 American Institute of physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2008 AIP Proc. Vol.983 p103-105.pdf | Open Access | 461.47 kB | Adobe PDF | View/Open |
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