  The current standard solar models can be improved by substituting the
relativistic equilibrium velocity distribution for the Maxwellian velocity
distribution. The relativistic equilibrium velocity distribution is close-
fitting to the Maxwellian velocity distribution in the low-velocity part and
substantially different from the Maxwellian velocity distribution in the
high-velocity part, and vanishes at the velocity of light. If adopted in
standard solar models, it will lower solar neutrino fluxes, change solar
neutrino energy spectra but maintain solar sound speeds.
