The neutrino star in the bulk Universe
  Motivated by the Kaluza-Klein theory with large extra spacetime dimensions the neutrino star built from the massive sterile neutrinos core and the massless brane neutrinos envelope is presented. The six - dimensional compactification scale ~15 MeV gives the maximal neutrino mass M_max = 2.3 10^4 of the solar mass with the radius R_max = 1.2 10^6 km . The maximal neutrino star parameters varies with temperature. In the limit of the neutrino ball approximation the maximal sterile neutrino star is M_max = 1.1 10^6 of the solar mass. 
R. Manka, D. Karczewska (University of Silesia)