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http://hdl.handle.net/2289/1602| Title: | Evidence for evolving elongated pulsar beams |
| Authors: | Narayan, R. Vivekanand, M. |
| Keywords: | Linear polarization Magnetic poles Polarization characteristics Pulsars Stellar evolution Beams(radiation) Elongation Milky way galaxy Periodic variations Polar caps Stellar models |
| Issue Date: | Jun-1983 |
| Publisher: | Springer-Verlag |
| Citation: | Astronomy and Astrophysics, 1983, Vol.122, p45-53. |
| Abstract: | The total change in the position angle of the linear polarization in 16 pulsars is analyzed (assuming the Radhakrishnan-Cooke (1969) magnetic pole model of pulsar radiation), on the basis of Backer and Rankin's (1980) observational data. The pulsar beams are on the average highly elongated, with the ratio R of the North-South to East-West dimensions being 3.0 + or - 0.4. The R estimate further increases if one allows for reasonable selection effects. The evolution of R with pulsar period P naturally accounts for the P dependence of interpulse occurrence. The evolution of the pulsar beaming fraction f with P renders more certain the recent observation of a deficit of short P pulsars in the Galaxy. Current pulsar electrodynamics and radio beam theories may have to be revised to account for the present results. |
| URI: | http://hdl.handle.net/2289/1602 |
| ISSN: | 0004-6361 |
| Alternative Location: | http://adsabs.harvard.edu/cgi-bin/bib_query?1983A&A...122...45N |
| Copyright: | (1983) by the European Southern Observatory. Scanned images provided by the NASA ADS. |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1983 A&A V122 p45.pdf | 9p. | 1.53 MB | Adobe PDF | View/Open |
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