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Pulsar radio beams and emission altitudes

Published online by Cambridge University Press:  12 April 2016

Jaroslaw Kijak  and
Janusz A. Gil
Jaroslaw Kijak
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Janusz A. Gil
Affiliation:
Astronomy Centre, Pedagogical University, Zielona Góra, Poland

Extract

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We verify the relationship proposed by Kijak and Gil (1996) for the pulsar radio emission altitudes

(see also Eq.3 in Gil & Krawczyk, 1996), using the pulse-profile Effelsberg raw data at 1.41 GHz. We measured profile pulse-widths at the lowest intensity level corresponding to 0.01% of the maximum intensity (Fig. 1b), using the polarlog-scale technique (Hankins and Fowler, 1986). We calculated opening angles (Fig. 1a) and emission altitudes (Fig. 1c) assuming that: i) pulsar radiation is narrow-band with radius-to-frequency mapping operating in the emission region, ii) pulsar emission is beamed tangentially to the dipolar magnetic field lines, iii) the extreme profile wings originate near or at the last open field lines.

Type
Part 4 Radio Properties
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 287 - 288
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Cordes, J.M. 1992, Proc. IAU Colloquium # 128, p. 253 Google Scholar
Gil, J. & Krawczyk, A. 1996, MNRAS, in pressGoogle Scholar
Hankins, T.H. & Fowler, L.A. 1986, ApJ, 304, 256 CrossRefGoogle Scholar
Kijak, J. & Gil, J. 1996, in preparationGoogle Scholar