Theory of pulsars: polar gaps, sparks, and coherent microwave radiation

Ruderman, M.; Sutherland, P. G.

doi:10.2172/4258471

Cited by 24 publications

(59 citation statements)

References 10 publications

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“…The inhomogeneities, which lead to (partially) coherent radiation, are associated with evolution of instabilities of the bunches in magnetospheric plasma [4]. Initial inhomogeneities already appear at the electrons emission from the surface of the star or at the beginning of the positrons return motion in the lower magnetosphere [5,[35][36][37][38][39] (for the analogies in the electron beams ejected from the Sun see e.g. [40]).…”

Section: Discussionmentioning

confidence: 99%

“…see [29,30]) for distribution of the energy radiated by a particle with the known law of motion 0 ( ) t  r r 5 :…”

Section: Spectral-angular Characteristics Of Radiation By a Returningmentioning

confidence: 99%

“…D DAVID PUBLISHING [3]). During the acceleration process the electrons move inside a polar gap [4][5][6], between the surface of the star and the pair plasma. We accept that the polar gaps are also the sources of electromagnetic radiation which has relatively narrow angular distribution around the magnetic axis but occupies a wide range of frequencies: from radio to gamma.…”

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confidence: 99%

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On the Mystery of the Interpulse Shift in the Crab Pulsar

Конторович¹,

Trofymenko²

2017

JPSA

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Abstract:A new mechanism of radiation emission in the polar gap of a pulsar is proposed. It is the curvature radiation emitted by positrons moving towards the surface of the neutron star along inclined magnetic field and reflected from the surface. Such radiation interferes with transition radiation emitted from the neutron star when positrons hit the surface. Proposed mechanism explains the mystery of the interpulse shift in the Crab pulsar at high frequencies discovered by Moffett and Hankins twenty years ago. We have found also reflected energy flux and spectrum, discussed coherence and disappearance of interpulse shift with increase of frequency.

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Section: Discussionmentioning

confidence: 99%

“…see [29,30]) for distribution of the energy radiated by a particle with the known law of motion 0 ( ) t  r r 5 :…”

Section: Spectral-angular Characteristics Of Radiation By a Returningmentioning

confidence: 99%

mentioning

confidence: 99%

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On the Mystery of the Interpulse Shift in the Crab Pulsar

Конторович¹,

Trofymenko²

2017

JPSA

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“…However, relativistic plasmas are present in many physical systems, like pulsar magnetospheres (Curtis, 1991;Ruderman and Sutherland, 1975;Cheng and Ruderman, 1980), AGN jets (Wardle et al, 1998;Hirotani et al, 2000;Wardle and Homan, 2001) and experiments in laser plasma interactions (Mourou and Umstadter, 1992;Fuchs et al, 1999). On the other hand, non-neutrality and/or turbulence are relevant to several of these systems (Luo et al, 2002;Schlickeiser et al, 2002;Naumova et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

A nonextensive statistics approach for Langmuir waves in relativistic plasmas

Muñoz

2006

Nonlin. Processes Geophys.

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Abstract. The nonextensive statistics formalism proposed by Tsallis has found many applications in systems with memory effects, long range spatial correlations, and in general whenever the phase space has fractal or multi-fractal structure. These features may appear naturally in turbulent or non-neutral plasmas. In fact, the equilibrium distribution functions which maximize the nonextensive entropy strongly resemble the non-Maxwellian particle distribution functions observed in space and laboratory and turbulent pure electron plasmas.In this article we apply the Tsallis entropy formalism to the problem of longitudinal oscillations in a proton-electron plasma. In particular, we study the equilibrium distribution function and the dispersion relation of longitudinal oscillations in a relativistic plasma, finding interesting differences with the nonrelativistic treatment.

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“…Such plasmas are found in pulsar magnetospheres (Curtis, 1991;Ruderman and Sutherland, 1975;Cheng and Ruderman, 1980), models of the primitive Universe (Tajima and Taniuti, 1990), active galactic nuclei jets (Wardle et al, 1998;Hirotani et al, 2000;Wardle and Homan, 2001), and laboratory and tokamak plasmas (Zank and Greaves, 1995;Berezhiani and Mahajan, 1994). Relativistic effects are expected to play an important role in several of these systems.…”

Section: Introductionmentioning

confidence: 99%

Kinetic effects on the parametric decays of Alfvén waves in relativistic pair plasmas

2006

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Parametric decays of a circularly polarized wave propagating along a constant magnetic field in an electronpositron plasma are studied. Fully relativistic effects on the particle velocity in the wave field are considered, as well as kinetic effects in the parallel direction, by means of a one-dimensional relativistic Vlasov equation. In this approximation, a dispersion relation is found for the parametric decays which describes the coupling between normal modes of the system, namely electromagnetic sideband modes and Langmuir waves.

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Theory of pulsars: polar gaps, sparks, and coherent microwave radiation

Cited by 24 publications

References 10 publications

On the Mystery of the Interpulse Shift in the Crab Pulsar

On the Mystery of the Interpulse Shift in the Crab Pulsar

A nonextensive statistics approach for Langmuir waves in relativistic plasmas

Kinetic effects on the parametric decays of Alfvén waves in relativistic pair plasmas

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