Can a Very Low-Luminosity and Cold White Dwarf be a Self-gravitating   Bose Condensed System
  An entirely new model for the structure as well as for the cooling mechanism of white dwarfs has been proposed. We have argued that the massive part of the constituents of white dwarfs- the positively charged ions are boson and under the extreme physical condition (density and temperature) at the interior, it is possible to have condensation of charged bose gas. We have tried to establish that a cold white dwarf is a self gravitating charged bose condensed system. 
Nandini Nag and Somenath Chakrabarty