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  Investigating superconductivity in neutron star interiors with glitch models

Haskell, B., Pizzochero, P. M., & Seveso, S. (2013). Investigating superconductivity in neutron star interiors with glitch models. The Astrophysical Journal Letters, 764(2): L25. doi:10.1088/2041-8205/764/2/L25.

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 Urheber:
Haskell, Brynmor1, Autor
Pizzochero, Pierre M., Autor
Seveso, Stefano, Autor
Affiliations:
1AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24008              

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Schlagwörter: Astrophysics, Solar and Stellar Astrophysics, astro-ph.SR
 Zusammenfassung: The high density interior of a neutron star is expected to contain superconducting protons and superfluid neutrons. Theoretical estimates suggest that the protons will form a type II superconductor in which the stellar magnetic field is carried by flux tubes. The strong interaction between the flux tubes and the neutron rotational vortices could lead to strong 'pinning', i.e. vortex motion could be impeded. This has important implications especially for pulsar glitch models as it would lead to a large part of the vorticity of the star being decoupled from the 'normal' component, to which the electromagnetic emission is locked. In this paper we explore the consequences of strong pinning in the core on the 'snowplow' model for pulsar glitches (Pizzochero 2011), making use of realistic equations of state and relativistic background models for the neutron star. We find that in general a large fraction of pinned vorticity in the core is not compatible with observations of giant glitches in the Vela pulsar. The conclusion is thus that either most of the core is in a type I superconducting state or that the interaction between vortices and flux tubes is weaker than previously assumed.

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 Datum: 2012-09-272013
 Publikationsstatus: Erschienen
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 Identifikatoren: arXiv: 1209.6260
DOI: 10.1088/2041-8205/764/2/L25
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Titel: The Astrophysical Journal Letters
  Andere : Astrophys. J. Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Chicago, IL : University of Chicago Press for the American Astronomical Society
Seiten: - Band / Heft: 764 (2) Artikelnummer: L25 Start- / Endseite: - Identifikator: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215