Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nwap.conf..123f&link_type=abstract
NEW WORLDS IN ASTROPARTICLE PHYSICS. Proceedings of the Fourth International Workshop. Held 5-7 September 2002 in Faro, Portugal
Physics
Scientific paper
We use the confining chromodielectric model to study quark matter. In the version of the model with a quartic potential for the confining field we obtain two solutions for the mean-field equations. The resulting equations of state for strange quark matter are degenerate at large densities with a small energy barrier between them. As the density decreases the barrier gets higher lowering the probability for transitions between the two solutions. The solution that is lower in energy saturates around the nuclear matter density and corresponds to a chiral broken phase with massive quarks. The other solution, saturates at around five times the nuclear matter saturation density and corresponds to a chiral symmetric phase with massless quarks. Using the Tolman-Oppenheimer-Volkoff equations we study the structure of compact objects emerging from the equations of state. It turns out that the metastable equations yield pure quark stars with roughly a solar mass, and radii below 10 km. These objects, however, are not absolutely stable.
Fiolhais Manuel
Malheiro Manuel
Taurines Andre R.
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