On the basis of the unified model of compact radio sources , the dependence of a turnover frequency in the smoothed radio spectrum of a pulsar upon the ratio of the dispersion measure D to the period P of a pulsar is obtained .
This relation is produced by the radial density wave in the accretion disk surrounding a pulsar .
The unified model of compact radio sources gives also the smoothed spectral indices of radio emission from pulsars as \alpha = 2 for the gaseous disk with the temperature profile T=const and \alpha = 3 for the gaseous disk with the pressure profile P=const ( F _ { \nu } \propto \nu ^ { - \alpha } ) .
The transverse density wave in the magnetosphere of a pulsar can be responsible for the polarisation of optical radiation from pulsars .