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  1. ui.adsabs.harvard.edu

    Pulsar magnetospheres are thought to be filled with pair plasma generated in strong discharges. The driving mechanism of these discharges is the consecutive emission of gamma-ray curvature radiation, its reabsorption in the extreme magnetic field of these objects, and the subsequent production of pairs via Quantum Electrodynamics (QED) processes. Modelling pair discharges from first principles ...
    Author:Fabio Cruz, Thomas Grismayer, Luis O. Silva, Alexander Y. Chen, Anatoly SpitkovskyPublished:2020
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  3. meetings.aps.org

    We show that electrostatic plasma waves are generated during the periodic pair discharges, and convert to an electromagnetic mode that is highly collimated along the pulsar magnetic axis. Furthermore, we propose a reduced model for the pair production process that qualitatively reproduces the \textit{ab initio} results.
  4. absimage.aps.org

    periodic pair discharges, and convert to an electromagnetic mode that is highly colli-mated along the pulsar magnetic axis. Furthermore, we propose a reduced model for the pair production process that qualitatively reproduces the ab initio results. Using this model, we analytically describe the development of the pair cascade, demon-strate that ...
  5. stats.iop.org

    (PIC) modeling of pulsar magnetospheres has been made by several groups. It was shown how the magnetospheric structure changes from the charge-separated disk-dome configuration to the plasma-filled state, becoming close to the force-free solution under sufficient plasma supply from pair discharges (Chen & Beloborodov 2014; Philippov ...
  6. oar.princeton.edu

    incorporated pair production into the aligned pulsar simulation, and Philippov et al. (2015, hereafter PSC15) extended this study to oblique rotators. New challenges appeared as well. It was shown that there is no pair formation in the bulk of the polar cap in the aligned rotator (CB14) and in the oblique magnetospheres with inclination a 40 ...
  7. to connect the physical model to observations, an ab initio plasma model is required, taking into account basic plasma processes at microscopic (i.e., kinetic) scales, pair production, the radiation-reaction force, and general relativistic e ects. In this respect, the particle-in-cell (PIC) approach has proven
  8. pubs.aip.org

    Time-dependent cascades of electron-positron pairs are thought to be the main source of plasma in pulsar magnetospheres and a primary ingredient to explain the . ... and using an heuristic model of the pair production process. The analytical results are confirmed with particle-in-cell simulations performed with the OSIRIS code that include ...
  9. In this paper, we consider two sources of pair production: magnetic conversion and the two-photon decay. The rst channel operates near the star, at r<2R. We model the magnetic conversion in a way described in PSC15: a new pair is injected whenever the energy of a simu-lation particle exceeds the threshold value, > min, which is set to min = 0: ...
  10. It has recently been demonstrated that self-consistent particle-in-cell simulations of low-obliquity pulsar magnetospheres in at spacetime show weak particle acceleration and no pair production near the poles. We investigate the validity of this conclusion in a more realistic spacetime geometry via
  11. iopscience.iop.org

    In recent years, significant progress in global particle-in-cell (PIC) modeling of pulsar magnetospheres has been made by several groups. It was shown how the magnetospheric structure changes from the charge-separated disk-dome configuration to the plasma-filled state, becoming close to the force-free solution under sufficient plasma supply from pair discharges (Chen & Beloborodov 2014 ...

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