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Timing observations of rapidly rotating neutron stars revealed a great numberof glitches, observed both from canonical radio pulsars and magnetars. Amongthem, 76 glitches have shown exponential relaxation(s) with characteristicdecay times ranging from several days to a few months, followed by a moregradual recovery. Glitches displaying exponential relaxation with single ormultiple decay time constants are analysed in terms of a model based on theinteraction of the vortex lines with the toroidal arrangement of flux tubes inthe outer core of the neutron star. Model results agree with the observedtimescales in general. Thus, the glitch phenomenon can be used to deducevaluable information about neutron star structure, in particular on theinterior magnetic field configuration which is unaccessible from surfaceobservations. One immediate conclusion is that the magnetar glitch data arebest explained with a much cooler core and therefore require that direct Urcatype fast cooling mechanisms should be effective for magnetars.

Postglitch exponential relaxation of radio pulsars and magnetars in terms of vortex creep across flux tubes