Bulk viscosity in superfluid neutron star cores
P. HaenselN. Copernicus Astronomical Center, Bartycka 18, 00-716 Warszawa, PolandК. П. ЛевенфишIoffe Physical Technical Institute, Politekhnicheskaya 26, 194021 St.-Petersburg, Russia e-mail: ksen,[email protected]D. G. YakovlevIoffe Physical Technical Institute, Politekhnicheskaya 26, 194021 St.-Petersburg, Russia e-mail: ksen,[email protected]
2002en
ABI
Abstract
The bulk viscosity of neutron star cores containing hyperons is studied taking into account non-equilibrium weak process . The 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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