Mathematics – Logic
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvd..51.1989b&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 51, Issue 4, 15 February 1995, pp.1989-1993
Mathematics
Logic
63
Phenomenological Quark Models, Thermodynamic Functions And Equations Of State, Neutron Stars
Scientific paper
We study the properties and stability of strange matter at T=0 in the quark mass-density-dependent model for noninteracting quarks. We found a wide ``stability window'' for the values of the parameters (C,Ms0) and the resulting equation of state at low densities is stiffer than that of the MIT bag model. At high densities it tends to the ultrarelativistic behavior expected because of the asymptotic freedom of quarks. The density of zero pressure is near the one predicted by the bag model and not shifted away as stated before; nevertheless, at these densities the velocity of sound is ~=50% larger in this model than in the bag model. We have integrated the equations of stellar structure for strange stars with the present equation of state. We found that the mass-radius relation is very much the same as in the bag model, although it extends to more massive objects, due to the stiffening of the equation of state at low densities.
Benvenuto Omar G.
Lugones German
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