Hydrodynamical trigger mechanism for pulsar glitches
Hydrodynamical trigger mechanism for pulsar glitches
We describe a new instability that may trigger the global unpinning of vortices in a spinning neutron star, leading to the transfer of angular momentum from the superfluid component to the star’s crust. The instability, which is associated with the inertial r modes of a superfluid neutron star, sets in once the rotational lag in the system reaches a critical level. We demonstrate that our simple model agrees well with the observed glitch data. This new idea should stimulate work on more detailed neutron star models, which would account for the crustal shear stresses and magnetic field effects we have ignored.
141101
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
10 April 2009
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas and Andersson, Nils
(2009)
Hydrodynamical trigger mechanism for pulsar glitches.
Physical Review Letters, 102 (14), .
(doi:10.1103/PhysRevLett.102.141101).
Abstract
We describe a new instability that may trigger the global unpinning of vortices in a spinning neutron star, leading to the transfer of angular momentum from the superfluid component to the star’s crust. The instability, which is associated with the inertial r modes of a superfluid neutron star, sets in once the rotational lag in the system reaches a critical level. We demonstrate that our simple model agrees well with the observed glitch data. This new idea should stimulate work on more detailed neutron star models, which would account for the crustal shear stresses and magnetic field effects we have ignored.
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Published date: 10 April 2009
Organisations:
Applied Mathematics
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Local EPrints ID: 151295
URI: http://eprints.soton.ac.uk/id/eprint/151295
PURE UUID: 20988890-33c5-4968-a692-64989557e127
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Date deposited: 10 May 2010 10:52
Last modified: 14 Mar 2024 02:42
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Author:
Kostas Glampedakis
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