|V|: New insight into the circular polarization of radio pulsars

Details |V|: New insight into the circular polarization of radio pulsars |V|: New insight into the circular polarization of radio pulsars

2003-08-13

arxiv.org/abs/astro-ph/0308221v1

Mon.Not.Roy.Astron.Soc.344:L69,2003

Astronomy and Astrophysics

Astrophysics

5 pages, accepted for publication in MNRAS letters

Scientific paper

10.1046/j.1365-8711.2003.07096.x

We present a study of single pulses from nine bright northern pulsars to investigate the behaviour of circular polarisation, V. The observations were conducted with the Effelsberg 100-m radio telescope at 1.41 GHz and 4.85 GHz and the Westerbork radio telescope at 352 MHz. For the first time, we present the average profile of the absolute circular polarisation |V| in the single pulses. We demonstrate that the average profile of |V| is the distinguishing feature between pulse components that exhibit low V in the single pulses and components that exhibit high V of either handedness, despite both cases resulting in a low mean. We also show that the |V| average profile remains virtually constant with frequency, which is not generally the case for V, leading us to the conclusion that |V| is a key quantity in the pulsar emission problem.

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