  The decay of magneto-plasma into neutrino anti-neutrino pair has been studied
in the framework of the electro-weak interaction theory. The decay rate is
calculated and the expression for the energy-loss rate is obtained in the
extreme relativistic case. The neutrino luminosity has also been computed for a
neutron star. A comparative study between the decay of magneto-plasma and the
ordinary plasma neutrino process has been outlined in view of the cooling of
highly magnetized star. The effect of this process in the different regions
during the late stages of stellar evolution is discussed briefly.
