DE-SITTER-SCHWARZSCHILD BLACK-HOLE - ITS PARTICLE-LIKE CORE AND THERMODYNAMICAL PROPERTIES

We analyze the globally regular solution of the Einstein equations des cribing a black hole whose singularity is replaced by the de Sitter co re. The de Sitter-Schwarzschild black hole (SSBH) has two horizons. In side of it there exists a particlelike structure hidden under the exte rnal horizon. The critical value of mass parameter M(cr1) exists corre sponding to the degenerate horizon. It represents the lower limit for a black-hole mass. Below M(cr1) there is no black hole, and the de Sit ter-Schwarzschild solution describes a recovered particlelike structur e. We calculate the Hawking temperature of SSBH and show that specific heat is broken and changes its sign at the value of mass M(cr2) > M(c r1) which means that a second-order phase transition occurs at that po int. We show that the Hawking temperature drops to zero when a mass ap proaches the lower limit M(cr1).