Physics
Scientific paper
Oct 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrvd..62h3001c&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 62, Issue 8, 15 October 2000, id.083001
Physics
20
Neutron Stars, Quark-Gluon Plasma
Scientific paper
Using the general relativistic conditions of thermodynamic equilibrium and fitting with values obtained from numerical integration of structure equations we derive approximate mass and radius formulas for static and uniformly rotating strange stars obeying the bag model equation of state. In the static case our formulas can reproduce the values of the mass and radius of the quark star with an error smaller than 1%. The maximum mass and radius of the strange stars can be predicted by fitting only one set of static configuration data. With the use of results obtained for the static configuration and with some supplementary assumptions about the behavior of the metric tensor at the center of the star, we can predict the rotational properties of maximally rotating strange stars within an error of 3%. From the approximate formulas we can derive the ``empirical'' formula relating the maximum rotation frequency of the uniformly rotating strange stars to the mass and radius of the maximum allowable static configuration.
Cheng Kwong Sang
Harko Tiberiu
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