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On the nature of optical emission from radio pulsars

Published online by Cambridge University Press:  12 April 2016

I.F. Malov  and
G.Z. Machabeli
I.F. Malov
Affiliation:
Pushchmo Radio Astronomy Observatory, Lebedev Physical Institute, 142292, Pushchmo, Russia
G.Z. Machabeli
Affiliation:
Pushchmo Radio Astronomy Observatory, Lebedev Physical Institute, 142292, Pushchmo, Russia

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There are more than one thousand known radio pulsars, but only 9 of them have detected optical emission (Caraveo 1999). A part of optical emission can be caused by thermal radiation from the hot surface of the neutron star. We shall try to describe the non-thermal component (Kurt et al. 1980) on the base of the synchrotron mechanism, using one-dimensional distribution function of emitting electrons.

One of the possible reasons of observed pulsar emission is the cyclotron instability developed in an anisotropic plasma (Sagdeev & Shafranov 1960). To generate transversal (t) waves with the spectrum

the condition of the cyclotron resonance (Kazbegi et al. 1992)

must be fulfilled. Here is the Lorentz-factor of resonance particles, is the drift velocity of particles, ρ is the curvature radius of field lines.

Type
Part 6. Emission and Plasma Theory
Information
International Astronomical Union Colloquium , Volume 177: Pulsar Astronomy - 2000 and Beyond , 2000 , pp. 421 - 422
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

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Kazbegi, A.Z., Machabeli, G.Z., Melikidze, G.I. Proc IAU Colloq. 128. 1992. P.232.Google Scholar
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