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Pulsar glitches: the crust is not enough

Pulsar glitches: the crust is not enough
Pulsar glitches: the crust is not enough
Pulsar glitches are traditionally viewed as a manifestation of vortex dynamics associated with a neutron superfluid reservoir confined to the inner crust of the star. In this Letter we show that the nondissipative entrainment coupling between the neutron superfluid and the nuclear lattice leads to a less mobile crust superfluid, effectively reducing the moment of inertia associated with the angular momentum reservoir. Combining the latest observational data for prolific glitching pulsars with theoretical results for the crust entrainment, we find that the required superfluid reservoir exceeds that available in the crust. This challenges our understanding of the glitch phenomenon, and we discuss possible resolutions to the problem
241103-[5pp]
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Espinoza, Cristobal M.
505d9674-e6db-4fa6-bcb3-5365b2d8121c
Andersson, Nils
2dd6d1ee-cefd-478a-b1ac-e6feedafe304
Glampedakis, Kostas
a08893ef-dd87-4ccb-9d65-3fd6c40fccca
Ho, Wynn C.G.
d78d4c52-8f92-4846-876f-e04a8f803a45
Espinoza, Cristobal M.
505d9674-e6db-4fa6-bcb3-5365b2d8121c

Andersson, Nils, Glampedakis, Kostas, Ho, Wynn C.G. and Espinoza, Cristobal M. (2012) Pulsar glitches: the crust is not enough. Physical Review Letters, 109 (24), 241103-[5pp]. (doi:10.1103/PhysRevLett.109.241103).

Record type: Article

Abstract

Pulsar glitches are traditionally viewed as a manifestation of vortex dynamics associated with a neutron superfluid reservoir confined to the inner crust of the star. In this Letter we show that the nondissipative entrainment coupling between the neutron superfluid and the nuclear lattice leads to a less mobile crust superfluid, effectively reducing the moment of inertia associated with the angular momentum reservoir. Combining the latest observational data for prolific glitching pulsars with theoretical results for the crust entrainment, we find that the required superfluid reservoir exceeds that available in the crust. This challenges our understanding of the glitch phenomenon, and we discuss possible resolutions to the problem

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More information

Published date: 13 December 2012
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 346519
URI: https://eprints.soton.ac.uk/id/eprint/346519
PURE UUID: 5315ef36-8be5-4463-8bd6-b62d4c32c44d
ORCID for Nils Andersson: ORCID iD orcid.org/0000-0001-8550-3843
ORCID for Wynn C.G. Ho: ORCID iD orcid.org/0000-0002-6089-6836

Catalogue record

Date deposited: 03 Jan 2013 11:35
Last modified: 12 Nov 2019 01:55

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