C. Peralta and A. Melatos 2009 ApJ 701 L75 doi:10.1088/0004-637X/701/2/L75
C. Peralta1,3 and A. Melatos2
Show affiliationsExperimental and numerical evidence is reviewed for the existence of a Stewartson layer in spherical Couette flow at small Ekman and Rossby numbers (E
10–3, Ro
10–2), the relevant hydrodynamic regime in the superfluid outer core of a neutron star. Numerical simulations of a superfluid Stewartson layer are presented for the first time, showing how the layer is disrupted by nonaxisymmetric instabilities. The unstable ranges of E and Ro are compared with estimates of these quantities in radio pulsars that exhibit glitches. It is found that glitching pulsars lie on the stable side of the instability boundary, allowing differential rotation to build up before a glitch.
dense matter; hydrodynamics; stars: interiors; stars: neutron; stars: rotation
97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages
Issue 2 (2009 August 20)
Received 2009 June 10, accepted for publication 2009 July 17
Published 2009 July 30
C. Peralta and A. Melatos 2009 ApJ 701 L75
S S Manna and A Kabakçioglu 2003 J. Phys. A: Math. Gen. 36 L279
Jianfeng Feng et al 2003 J. Phys. A: Math. Gen. 36 7469
Werner Becker et al. 2004 ApJ 615 908
P R Barber et al 2003 J. Phys. D: Appl. Phys. 36 1729
D. K. Ojha et al. 2004 ApJ 608 797
S Havlin et al 1985 J. Phys. A: Math. Gen. 18 L719
Ni Jun et al 2001 Chinese Phys. Lett. 18 1504
T Nandi and B P Mohanty 2009 J. Phys. B: At. Mol. Opt. Phys. 42 225402
J.H.F. Severo et al 2009 Nucl. Fusion 49 115026