Relaxation of the Angular Velocity of Pulsars after Glitches

The rotational dynamics of superfluid neutron stars is examined in order to study the relaxation of the angular velocity of pulsars after glitches. The motion of the neutron-proton vortex system is investigated taking the sphericity of the superfluid core and vortex pinning and depinning into accoun...

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Veröffentlicht in:	Astrophysics 2014-03, Vol.57 (1), p.90-104
Hauptverfasser:	Sedrakian, D. M., Hayrapetyan, M. V., Baghdasaryan, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Angular momentum Angular velocity Astronomy Astrophysics Astrophysics and Astroparticles Astrophysics and Cosmology Dynamics Fluid flow Fluids Glitches Neutron stars Observations Observations and Techniques Physics Physics and Astronomy Pulsars Space Exploration and Astronautics Space Sciences (including Extraterrestrial Physics Superfluidity Vortices
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Beschreibung
Zusammenfassung:	The rotational dynamics of superfluid neutron stars is examined in order to study the relaxation of the angular velocity of pulsars after glitches. The motion of the neutron-proton vortex system is investigated taking the sphericity of the superfluid core and vortex pinning and depinning into account. A relaxation solution is obtained for the angular rotation velocity of pulsars after glitches. In order to compare this solution with observational data for the Vela pulsar, the inverse problem of finding the initial distribution of vortices immediately after a glitch is solved.
ISSN:	0571-7256 1573-8191
DOI:	10.1007/s10511-014-9317-x