AN UNSTABLE SUPERFLUID STEWARTSON LAYER IN A DIFFERENTIALLY ROTATING NEUTRON STAR
نویسندگان
چکیده
منابع مشابه
An unstable superfluid Stewartson layer in a differentially rotating neutron star
Experimental and numerical evidence is reviewed for the existence of a Stewartson layer in spherical Couette flow at small Ekman and Rossby numbers (E < ∼ 10 , Ro < ∼ 10 ), 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 ...
متن کاملSlowly rotating superfluid Newtonian neutron star model with entrainment
We develop a formalism that can be used to model slowly rotating superfluid Newtonian neutron stars. A simple two-fluid model is used to describe the matter, where one fluid consists of the superfluid neutrons that are believed to exist in the inner crust and core of mature neutron stars, while the other fluid is a charge neutral conglomerate of the remaining constituents (crust nuclei, core su...
متن کاملSuperfluid 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 phenomenological model for isotropic turbulence, and derive the associated (Gorter-Mellink) form for the mutual f...
متن کاملGeminga: A Cooling Superfluid Neutron Star
We compare the recent temperature estimate for Geminga with neutron star cooling models. Because of its age (∼ 3.4 × 10 yr), Geminga is in the photon cooling era. We show that its surface temperature (∼ 5.2× 10 K) can be understood by both types of neutrino cooling scenarios, i.e, slow neutrino cooling by the modified Urca process or fast neutrino cooling by the direct Urca process or by some e...
متن کاملBulk viscosity in superfluid neutron star cores
The bulk viscosity of the neutron star matter due to the direct Urca processes involving nucleons, electrons and muons is studied taking into account possible superfluidity of nucleons in the neutron star cores. The cases of singlet-state pairing or triplet-state pairing (without and with nodes of the superfluid gap at the Fermi surface) of nucleons are considered. It is shown that the superflu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/701/2/l75