Escaping radio emission from pulsars: Possible role of velocity shear

摘要

It is demonstrated that the velocity shear, intrinsic to the e(sup +)e(sup (minus)) plasma present in the pulsar magnetosphere, can efficiently convert the nonescaping longitudinal Langmuir waves (produced by some kind of a beam or stream instability) into propagating (escaping) electromagnetic waves. It is suggested that this shear induced transformation may be the basic mechanism needed for the eventual generation of the observed pulsar radio emission.