Bulk viscosity in superfluid neutron star cores. III. Effects of $Σ^-$ hyperons

Details Bulk viscosity in superfluid neutron star cores. III. Effects of $Σ^-$ hyperons Bulk viscosity in superfluid neutron star cores. III. Effects of $Σ^-$ hyperons

2001-10-26

arxiv.org/abs/astro-ph/0110575v2

Astron.Astrophys.381:1080-1089,2002

Astronomy and Astrophysics

Astrophysics

LaTeX, 9 pages, added reference, version accepted by Astron. Astrophys

Scientific paper

10.1051/0004-6361:20011532

Bulk viscosity of neutron star cores containing hyperons is studied taking into account non-equilibrium weak process $n+n \rightleftharpoons p+\Sigma^-$. Rapid growth of the bulk viscosity within the neutron star core associated with switching on new reactions (modified Urca process, direct Urca process, hyperon reactions) is analyzed. The suppression of the bulk viscosity by superfluidity of baryons is considered and found out to be very important.

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