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Non-linear viscous saturation of r-modes
Mark Alford, Simin Mahmoodifar, Kai Schwenzer
Pulsar spin frequencies and their time evolution are an important source of information on compact stars and their internal composition. Oscillations of the star can reduce the rot…
Viscous damping of r-modes: Small amplitude instability
Mark Alford, Simin Mahmoodifar, Kai Schwenzer
We study the viscous damping of r-modes of compact stars and analyze in detail the regions where small amplitude modes are unstable to the emission of gravitational radiation. We p…
Suprathermal viscosity of dense matter
Mark G. Alford, Simin Mahmoodifar, Kai Schwenzer
Motivated by the existence of unstable modes of compact stars that eventually grow large, we study the bulk viscosity of dense matter, taking into account non-linear effects arisin…
Large amplitude behavior of the bulk viscosity of dense matter
Mark G. Alford, Simin Mahmoodifar, Kai Schwenzer
We study the bulk viscosity of dense matter, taking into account non-linear effects which arise in the large amplitude "supra-thermal" region where the deviation of the chemi…