Curvature Radiation in Pulsar Magnetospheric Plasma

We consider the curvature radiation of the point-like charge movingrelativistically along curved magnetic field lines through a pulsarmagnetospheric electron-positron plasma. We demonstrate that the radiationpower is largely suppressed as compared with the vacuum case, but still at aconsiderable level, high enough to explain the observed pulsar luminosities.The emitted radiation is polarized perpendicularly to the plane of the curvedmagnetic filed lines coincides with $ which can freely escape from themagnetospheric plasma. Our results strongly support the coherent curvatureradiation by the spark-associated solitons as a plausible mechanism of pulsarradio emission