Superfluid neutron star turbulence

We analyse the implications of superfluid turbulence for neutron star physics. We begin by extending our previous results for the mutual friction force for a straight vortex array to account for the self-induced flow which arises when the vortices are curved. We then discuss Vinen's phenomenolo...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2007-10, Vol.381 (2), p.747-756
Hauptverfasser: Andersson, N., Sidery, T., Comer, G. L.
Format: Artikel
Sprache:eng
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Zusammenfassung:We analyse the implications of superfluid turbulence for neutron star physics. We begin by extending our previous results for the mutual friction force for a straight vortex array to account for the self-induced flow which arises when the vortices are curved. We then discuss Vinen's phenomenological model for isotropic turbulence, and derive the associated (Gorter–Mellink) form for the mutual friction. We compare this derivation to a more recent analysis of Schwarz, which sheds light on various involved issues. Having discussed isotropic turbulence, we argue that this case is unlikely to be relevant for neutron stars. Instead, we expect a rotating neutron star to exhibit polarized turbulence, where relative flow drives the turbulence and rotation counteracts it. Based on recent results for superfluid helium, we construct a phenomenological model that should have the key features of such a polarized turbulent system.
ISSN:0035-8711
1365-2966
DOI:10.1111/j.1365-2966.2007.12251.x