Polarisation of high-energy emission in a pulsar striped wind

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dc.creatorPetri, J.
dc.creatorKirk, J.
dc.date2007-01-09
dc.date.accessioned2026-07-07T11:20:56Z
dc.date.available2026-07-07T11:20:56Z
dc.descriptionRecent observations of the polarisation of the optical pulses from the Crab pulsar motivated detailed comparative studies of the emission predicted by the polar cap, the outer gap and the two-pole caustics models. In this work, we study the polarisation properties of the synchrotron emission emanating from the striped wind model. We use an explicit asymptotic solution for the large-scale field structure related to the oblique split monopole and valid for the case of an ultra-relativistic plasma. This is combined with a crude model for the emissivity of the striped wind and of the magnetic field within the dissipating stripes themselves. We calculate the polarisation properties of the high-energy pulsed emission and compare our results with optical observations of the Crab pulsar. The resulting radiation is linearly polarised. In the off-pulse region, the electric vector lies in the direction of the projection on the sky of the rotation axis of the pulsar, in good agreement with the data. Other properties such as a reduced degree of polarisation and a characteristic sweep of the polarisation angle within the pulses are also reproduced.
dc.descriptionProceedings of the 363. WE-Heraeus Seminar on: Neutron Stars and Pulsars (Posters and contributed talks) Physikzentrum Bad Honnef, Germany, May.14-19, 2006, eds. W.Becker, H.H.Huang, MPE Report 291, pp.108-111
dc.identifierhttps://arxiv.org/abs/astro-ph/0701250
dc.identifierhttp://arxiv.org/abs/astro-ph/0701250
dc.identifierAIPConf.Proc.983:210-212,2008
dc.identifierdoi:10.1063/1.2900144
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194116
dc.subjectAstrophysics
dc.titlePolarisation of high-energy emission in a pulsar striped wind
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