Antenna source of radio-frequency emission in ion-proton pulsars

Abstract

The growth of a longitudinal or quasi-longitudinal Langmuir mode in the outward-moving beam of ions and protons that forms the open sector of an ion-proton pulsar magnetosphere radiates as an analogue of an end-fed high-impedance horizontal straight-wire antenna an integral number of half-waves in length. The radiation has, broadly, the energy flux, linear polarization and spectral index that are widely observed: also, the notch phenomenon seen in some integrated pulse profiles occurs naturally. The new field of pulsar observations below 100 MHz may lead to productive tests of the radio emission mechanism.

arXiv comment6 pages: accepted for publication in Monthly Notices of the Royal Astronomical Society; replaced to include a new Section 2 containing an extended description of the assumptions on which the paper is based; later sections and conclusions are unchanged

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