STRUCTURE OF ROTATING NEUTRON-STARS WITH MESON CONDENSATES

We have investigated structures of uniformly rotating neutron stars wi th meson condensates. Since parameters pertinent to meson condensation are not uniquely determined, we have constructed equilibrium configur ations by using several equations of states both for kaon condensation and for pion condensation. It should be noted that kaon condensation affects the equation of state considerably for most possible parameter s of the equation of state, including those which are consistent with observational data such as the maximum mass of neutron stars. In parti cular we find that the maximum rotational velocity of uniformly rotati ng neutron stars with kaon condensates becomes larger by about 56% tha n that of the normal equation bf state. Therefore future discovery of extremely fast pulsars might become evidence of the existence of meson condensates in the high density region.