Possible New Class of Dense White Dwarfs

If the strange matter hypothesis of Bodmer and Witten is true, then a new class of white dwarfs can exist whose nuclear material in their deep interiors can have a density as high as the neutron drip density, a few hundred times the density in maximum-mass white dwarfs and $4\times {10}^4$ the density in dwarfs of typical mass, $M\sim {0.6M}_{\odot }$. Their masses fall in the approximate range ${10}^{-4\mathrm{}}$– ${1M}_{\odot }$. They are stable against acoustical modes of vibration. A strange quark core stabilizes these stars, which otherwise would have central densities that would place them in the unstable region of the sequence between white dwarfs and neutron stars.