【摘 要】
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The bulk viscosity of interacting strange quark matter in a strong external magnetic field Bm with a real equation of state is investigated.It is found that interquark interactions can significantly increase the bulk viscosity,and the magnetic field Bm ca
【机 构】
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School of Physics and Electrical Engineering,AnYang Normal University,Anyang 455000,China
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The bulk viscosity of interacting strange quark matter in a strong external magnetic field Bm with a real equation of state is investigated.It is found that interquark interactions can significantly increase the bulk viscosity,and the magnetic field Bm can cause irregular oscillations in both components of the bulk viscosity,ζ‖(parallel to Bm)andζ⊥(perpendicular to Bm).A comparison with non-interacting strange quark matter reveals that when Bm is sufficiently large,ζ⊥ is more affected by interactions than ζ‖.Additionally,the quasi-oscillation of the bulk viscosity with changes in density may facilitate the for-mation of magnetic domains.Moreover,the resulting r-mode instability windows are in good agreement with observational data for compact stars in low-mass X-ray binaries.Specifically,the r-mode instability window for interacting strange quark matter in high magnetic fields has a minimum rotation frequency exceeding 1050 Hz,which may explain the observed very high spin frequency of a pulsar with v=1122 Hz.
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