Hyperon bulk viscosity in strong magnetic fields

Details Hyperon bulk viscosity in strong magnetic fields Hyperon bulk viscosity in strong magnetic fields

2008-09-19

arxiv.org/abs/0809.3337v2

Phys.Rev.D79:123001,2009

Astronomy and Astrophysics

Astrophysics

LaTex, 28 pages including 9 figures; new results are discussed in section IV

Scientific paper

10.1103/PhysRevD.79.123001

We study the bulk viscosity of neutron star matter including $\Lambda$ hyperons in the presence of quantizing magnetic fields. Relaxation time and bulk viscosity due to both the non-leptonic weak process involving $\Lambda$ hyperons and direct Urca processes are calculated here. In the presence of a strong magnetic field of $10^{17}$ G, the hyperon bulk viscosity coefficient is reduced whereas bulk viscosity coefficients due to direct Urca processes are enhanced compared with their field free cases when many Landau levels are populated by protons, electrons and muons.

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