# Vorticity affects the stability of neutron stars

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**Vorticity affects the stability of neutron stars.** / Rezania, V.; Maartens, R.

Research output: Contribution to journal › Article › peer-review

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*Physical Review Letters*, vol. 84, no. 12, pp. 2560-2563. https://doi.org/10.1103/PhysRevLett.84.2560

### APA

*Physical Review Letters*,

*84*(12), 2560-2563. https://doi.org/10.1103/PhysRevLett.84.2560

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TY - JOUR

T1 - Vorticity affects the stability of neutron stars

AU - Rezania, V.

AU - Maartens, R.

PY - 2000/3/20

Y1 - 2000/3/20

N2 - The spin rate Ω of neutron stars at a given temperature T is constrained by the interplay between gravitational-radiation instabilities and viscous damping. Navier-Stokes theory has been used to calculate the viscous damping time scales and produce a stability curve for r modes in the (Ω,T ) plane. In Navier-Stokes theory, viscosity is independent of vorticity, but kinetic theory predicts a coupling of vorticity to the shear viscosity. We calculate this coupling and show that it can in principle significantly modify the stability diagram at lower temperatures. As a result, colder stars can remain stable at higher spin rates.

AB - The spin rate Ω of neutron stars at a given temperature T is constrained by the interplay between gravitational-radiation instabilities and viscous damping. Navier-Stokes theory has been used to calculate the viscous damping time scales and produce a stability curve for r modes in the (Ω,T ) plane. In Navier-Stokes theory, viscosity is independent of vorticity, but kinetic theory predicts a coupling of vorticity to the shear viscosity. We calculate this coupling and show that it can in principle significantly modify the stability diagram at lower temperatures. As a result, colder stars can remain stable at higher spin rates.

UR - https://journals.aps.org/prl/issues/84/12

U2 - 10.1103/PhysRevLett.84.2560

DO - 10.1103/PhysRevLett.84.2560

M3 - Article

VL - 84

SP - 2560

EP - 2563

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 12

ER -

ID: 2870323