POSSIBLE SIGNATURES OF THE CONVERSION OF A NEUTRON-STAR TO A STRANGE STAR

The problem of the identification of strange stars is discussed. We su ggest some characteristic signatures for the search for strange stars: a two-step mechanism for supernova explosions accompanied by the occu rrence of strange stars and two neutrino bursts; microstructure analys is in the profile of pulsar emission; and unusual stability in the rot ation of millisecond pulsars due to the absence of internal crust in s trange stars. The cooling of strange stars is faster than the cooling of ordinary neutron stars, so low surface temperature of pulsars can i ndicate the existence of massive quark cores in observed pulsars. Low mass strange stars as bursters and/or X-ray sources have peculiar obse rvable features: low luminosity and (for bursters) high recurrence rat e, large duration of bursts, low ratio of energy emitted between two b ursts and energy emitted during the burst.