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Title:
Quantum Condensates in Extreme Gravity:. Implications for Cold Stars and Dark Matter
Authors:
Silverman, M. P.
Affiliation:
AA(Department of Physics, Trinity College, Hartford CT 06070, , USA; )
Publication:
International Journal of Modern Physics D, Volume 17, Issue 03-04, pp. 603-609 (2008). (IJMPD Homepage)
Publication Date:
00/2008
Origin:
WSPC
Keywords:
Neutron condensate, neutron star, white dwarf, black hole, relativistic degenerate star, stellar equilibrium, Schwarzschild geometry, Bose-Einstein condensate, dark matter, Oppenheimer-Volkoff equation, Gross-Pitaevskii equation, Bethe-Johnson equation of state
DOI:
10.1142/S0218271808012334
Bibliographic Code:
2008IJMPD..17..603S

Abstract

Stable end-point stars currently fall into two distinct classes — white dwarfs and neutron stars — differing enormously in central density and radial size. No stable cold dead stars are thought to span the intervening densities or have masses beyond ~2-3 solar masses. I show, however, that the general-relativistic condition of hydrostatic equilibrium augmented by the equation of state of a neutron condensate at 0 K generates stable sequences of cold stars that span the density gap and can have masses well beyond prevailing limits. The radial sizes and mass limit of each sequence are determined by the mass and scattering length of the composite bosons. Solutions for hypothetical bosons of ultrasmall mass and large scattering length yield huge self-gravitating systems of low density, resembling galactic dark matter halos.
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