<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Electron and positron acceleration at pulsar wind termination shocks"^^ . "Many astrophysical sources are very efficient particle accelerators. Among these, Pulsar Wind Nebulae (PWNe) are excellent \r\nlaboratories to study the acceleration mechanism because of their proximity and brightness.\r\nIn these objects, the rotational energy extracted from the central pulsar is converted in a striped-wind consisting of \r\nrelativistic electrons and positrons and large-amplitude electromagnetic fields. When the wind impacts with the surrounding \r\nmedium, a relativistic shock forms where the ordered flow of the pulsar becomes randomised and energetic particles emit \r\nSynchrotron and Inverse Compton radiation.\r\nWe study the conversion of the pulsar wind in a strong superluminal wave. The conversion is triggered by the interaction of \r\nthe wind with the shock when this is sufficiently far away from the pulsar. The shock structure is modified by the \r\nsuperluminal wave and the properties of the modified shock (precursor) depend on the Lorentz factor and magnetisation of the \r\nincoming wind. A relatively large fraction of electrons and positrons in the wind is energised and reflected by the turbulent\r\nelectromagnetic fields in the precursor and is available for further acceleration. We suggest that the onset of the precursor\r\nis a solution to the problem of injection in the acceleration mechanism. We investigate the acceleration of the injected \r\nparticles and we find that it proceeds in two distinct regimes, determined by the relative magnitude of the wavelength of the\r\nwind stripes and of the gyro-radius of energetic particles. We discuss the implications of this acceleration scenario in the \r\ncontext of PSR B1259-63, a pulsar powering a PWNe in a binary system."^^ . "2016" . . . . . . . "Simone"^^ . "Giacchè"^^ . "Simone Giacchè"^^ . . . . . . "Electron and positron acceleration at pulsar wind termination shocks (PDF)"^^ . . . "giacche_phd-thesis.pdf"^^ . . . "Electron and positron acceleration at pulsar wind termination shocks (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Electron and positron acceleration at pulsar wind termination shocks (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Electron and positron acceleration at pulsar wind termination shocks (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Electron and positron acceleration at pulsar wind termination shocks (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Electron and positron acceleration at pulsar wind termination shocks (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #21589 \n\nElectron and positron acceleration at pulsar wind termination shocks\n\n" . "text/html" . . . "520 Astronomie"@de . "520 Astronomy and allied sciences"@en . . . "530 Physik"@de . "530 Physics"@en . .