Radio Pulsars

Бескин, В. С.; Чернов, С. В.; Gwinn, C. R.; Tchekhovskoy, Alexander

doi:10.1007/s11214-015-0173-8

Cited by 26 publications

(25 citation statements)

References 187 publications

(240 reference statements)

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“…10,[108][109][110] Different from the normal stars, pulsars are highly magnetized with magnetic field up to 10 12 G while the magnetic field of solar corona is only 1 G. The pulsar plasma is highly relativistic electron-positron pair plasma in the source region. 10,111,112 The Langmuir collapse driven by relativistic beam instability is suggested to be responsible for the microsecond radio bursts. 109,110,113…”

Section: Potential Applications In Heliophysics and Astrophysicsmentioning

confidence: 99%

Electron two-stream instability and its application in solar and heliophysics

Che

2016

Mod. Phys. Lett. A

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It is well known that electron beams accelerated in solar flares can drive two-stream instability and produce radio bursts in the solar corona as well as in the interplanetary medium. Recent observations show that the solar wind likely originates from nanoflarelike events near the surface of the Sun where locally heated plasma escapes along open field lines into space. Recent numerical simulations and theoretical studies show that electron two-stream instability (ETSI) driven by nanoflare-accelerated electron beams can produce the observed nanoflare-type radio bursts, the non-Maxwellian electron velocity distribution function of the solar wind, and the kinetic scale turbulence in solar wind. This brief review focus on the basic theoretical framework and recent progress in the nonlinear evolution of ETSI, including the formation of electron holes, Langmuir wave generation in warm plasma, and the nonlinear modulation instability and Langmuir collapse. Potential applications in heliophysics and astrophysics are discussed.

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Section: Potential Applications In Heliophysics and Astrophysicsmentioning

confidence: 99%

Electron two-stream instability and its application in solar and heliophysics

Che

2016

Mod. Phys. Lett. A

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“…The topic has been discussed in many reviews, e.g. by Arons (1979); Michel (2004) and recently by Arons (2009Arons ( , 2012; Spitkovsky (2011); Bühler and Blandford (2014); Beskin et al (2015); Grenier and Harding (2015); Pétri (2016). We focus on the pulsar itself, i.e.…”

Section: Introductionmentioning

confidence: 99%

Electrodynamics of Pulsar Magnetospheres

2016

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We review electrodynamics of rotating magnetized neutron stars, from the early vacuum model to recent numerical experiments with plasmafilled magnetospheres. Significant progress became possible due to the development of global particle-in-cell simulations which capture particle acceleration, emission of high-energy photons, and electron-positron pair creation. The numerical experiments show from first principles how and where electric gaps form, and promise to explain the observed pulsar activity from radio waves to gamma-rays.

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“…In particular, CSs are believed to appear in the solar atmosphere 35,37 , solar wind 20 , planetary magnetospheres 25,36 , and in pulsar winds 6 . Magnetic reconnection occurring within CSs results in the transformation of the magnetic field energy into the kinetic energy of the plasma and accelerated non-thermal charged particles, and hence the kinetic bulk energy 45,53 .…”

Section: Introductionmentioning

confidence: 99%

Kinetic model of force-free current sheets with non-uniform temperature

2015

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go.warwick.ac.uk/lib-publicationsOriginal citation: Kolotkov, D. Y., Vasko, I. Y. and Nakariakov, V. M.. (2015) Kinetic model of force-free current sheets with non-uniform temperature. Physics of Plasmas, 22 (11). 112902. Permanent WRAP URL:http://wrap.warwick.ac.uk/78634 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. The kinetic model of a one-dimensional force-free current sheet (CS) developed recently by M. Harrison and T. Neukirch (Phys. Rev. Lett., vol. 6, 2009) predicts uniform distributions of the plasma temperature and density across the CS. However, in realistic physical systems inhomogeneities of these plasma parameters may arise quite naturally due to the boundary conditions or local plasma heating. Moreover, as the CS spatial scale becomes larger than the characteristic kinetic scales (the regime often referred to as the MHD limit) it should be possible to set arbitrary density and temperature profiles. Thus, an advanced model has to allow for inhomogeneities of the macroscopic plasma parameters across the CS, to be consistent with the MHD limit. In this paper we generalise the kinetic model of a force-free current sheet, taking into account the inhomogeneity of the density and temperature across the CS. In the developed model the density may either be enhanced or depleted in the CS central region. The temperature profile is prescribed by the density profile, keeping the plasma pressure uniform across the CS. All macroscopic parameters, as well as the distribution functions for the protons and electrons, are determined analytically. Applications of the developed model to current sheets observed in space plasmas are discussed.

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Radio Pulsars

Cited by 26 publications

References 187 publications

Electron two-stream instability and its application in solar and heliophysics

Electron two-stream instability and its application in solar and heliophysics

Electrodynamics of Pulsar Magnetospheres

Kinetic model of force-free current sheets with non-uniform temperature

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