Nature of microstructure in pulsar radio emission

Details Nature of microstructure in pulsar radio emission Nature of microstructure in pulsar radio emission

2000-01-08

arxiv.org/abs/astro-ph/0001132v1

Mon.Not.Roy.Astron.Soc. 327 (2001) 984

Astronomy and Astrophysics

Astrophysics

4 pages, submitted to MNRAS Letters

Scientific paper

10.1046/j.1365-8711.2001.04814.x

We present a model for microstructure in pulsar radio emission. We propose that micropulses result from the alteration of the radio wave generation region by nearly transverse drift waves propagating across the pulsar magnetic field and encircling the bundle of the open magnetic field lines. It is demonstrated that such waves can modify significantly curvature of these dipolar field lines. This in turn affects strongly fulfillment of the resonance conditions necessary for the excitation of radio waves. The time-scale of micropulses is therefore determined by the wavelength of drift waves. Main features of the microstructure are naturally explained in the frame of this model.

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