Journal Article

Pulsar glitch recovery and the superfluidity coefficients of bulk nuclear matter

C. A. van Eysden and A. Melatos

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 409, issue 3, pages 1253-1268
Published in print December 2010 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: https://dx.doi.org/10.1111/j.1365-2966.2010.17387.x
Pulsar glitch recovery and the superfluidity coefficients of bulk nuclear matter

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A two-component hydrodynamic model is constructed of the global superfluid flow induced by two-component Ekman pumping during the recovery stage of a glitch. The model successfully accounts for the quasi-exponential recovery observed in pulsars like Vela and the ‘overshoot’ observed in pulsars like the Crab. By fitting the model to high-resolution timing data, three important constitutive coefficients in bulk nuclear matter can be extracted: the shear viscosity, the mutual friction parameter and the charged fluid fraction. The fitted coefficients for the Crab and Vela are compared with theoretical predictions for several equations of state, including the colour–flavour locked and two-flavour colour superconductor phases of quark matter.

Keywords: dense matter; hydrodynamics; stars: interiors; stars: neutron; pulsars: general; stars: rotation

Journal Article.  12529 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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