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What is azimuthal vortex in glitch?

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Azimuthal vortex in a glitch refers to the accumulation of vortices in a specific region of a neutron star, inducing large differential rotation and triggering mass unpinning events . This phenomenon occurs when angular momentum is transferred suddenly from the star's interior to the crust by the collective unpinning and repinning of superfluid vortices . The presence of a moat, which represents a radially dependent pinning profile in the neutron star crust, can lead to the accumulation of vortices and larger glitches . The behavior of vortices in a glitch is influenced by the pinning potential associated with nuclei in the crustal lattice, which varies as a function of radius .

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Open access•Journal Article•DOI Collective, glitch-like vortex motion in a neutron star with an annular pinning barrier J. R. Lönnborn, Andrew Melatos, Brynmor Haskell - Show less +2 more 21 Jul 2019-Monthly Notices of the Royal Astronomical Society 10 Citations	The paper does not specifically mention the term "azimuthal vortex." The paper discusses the collective unpinning and repinning of vortices in neutron star glitches, but does not provide a specific definition or explanation of an "azimuthal vortex."
Open access•Journal Article•DOI Peculiar glitch of PSR J1119−6127 and extension of the vortex creep model O. Akbal, Erbil Gügercinoğlu, S. Şaşmaz Muş, M. A. Alpar - Show less +3 more 01 May 2015-Monthly Notices of the Royal Astronomical Society 29 Citations	The provided paper does not specifically mention the term "azimuthal vortex" in relation to glitches.
Open access•Journal Article•DOI Measuring the Vortex−Nucleus Pinning Force from Pulsar Glitch Rates Andrew Melatos, Margaret Millhouse - Show less +1 more 22 Feb 2023-The astrophysical journal	The provided paper does not mention the term "azimuthal vortex."

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