Bulk viscosity of strange quark matter in density-dependent quark mass model and dissipation of r-modes in strange stars

Details Bulk viscosity of strange quark matter in density-dependent quark mass model and dissipation of r-modes in strange stars Bulk viscosity of strange quark matter in density-dependent quark mass model and dissipation of r-modes in strange stars

2003-05-18

arxiv.org/abs/astro-ph/0305320v1

Phys. Rev. C70 (2004) 015803

Astronomy and Astrophysics

Astrophysics

11pages,7figures

Scientific paper

10.1103/PhysRevC.70.015803

We study the bulk viscosity of strange quark matter(SQM) in density dependent quark mass model(DDQM) under the background of self-consistent thermodynamics. The correct formulae, with which the viscosity can be evaluated, are derived. We also find that the viscosity in DDQM can be higher by 2 to 3 orders of magnitude than MIT bag model. We calculate the damping time scales due to viscosity coupled to r-modes. The numerical results show the time scale can't be shorter than $10^{-1}$s.

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