Finite force-free pulsar atmosphere models

Jackson, E. Atlee

doi:10.1086/157859

Cited by 6 publications

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“…Jackson (1978) emphasized also the notion of the corotational drift surface (CDS) in the arbitrary inclination angle case. Jackson (1976 a ) extensively studied the electrostatic problem of neutron star atmospheres in a series of papers (Jackson 1978, 1979, 1980 a , b , 1981 a , b ). Rylov (1976) computed analytical models of the region around neutron stars filled with electrons and protons/positrons.…”

Section: Electrosphere Modelsmentioning

confidence: 99%

Theory of pulsar magnetosphere and wind

Pétri

2016

J. Plasma Phys.

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Neutron stars are fascinating astrophysical objects immersed in strong gravitational and electromagnetic fields, at the edge of our current theories. These stars manifest themselves mostly as pulsars, emitting a timely very stable and regular electromagnetic signal. Even though discovered almost fifty years ago, they still remain mysterious compact stellar objects. In this review, we summarize the most fundamental theoretical aspects of neutron star magnetospheres and winds. The main competing models explaining their radiative properties like multi-wavelength pulse shapes and spectra and the underlying physical processes such as pair creation and radiation mechanisms are scrutinized. A global but still rather qualitative picture slowly emerges thanks to recent advances in numerical simulations on the largest scales. However considerations about pulsar magnetospheres remain speculative. For instance, the exact composition of the magnetospheric plasma is not yet known. Is it solely filled with a mixture of e ± leptons or does it contain a non-negligible fraction of protons and/or ions? Is it almost entirely filled or mostly empty except for some small anecdotal plasma filled regions? Answers to these questions will strongly direct the description of the magnetosphere to seemingly contradictory results leading sometimes to inconsistencies. Nevertheless, accounts are given as to the latest developments in the theory of pulsar magnetospheres and winds, the existence of a possible electrosphere and physical insight obtained from related observational signatures of multi-wavelength pulsed emission.

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Section: Electrosphere Modelsmentioning

confidence: 99%

Theory of pulsar magnetosphere and wind

Pétri

2016

J. Plasma Phys.

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“…An important feature of many models of pulsar magnetosphere is the presence of voids or gaps embedded in a charge-separated force-free plasma (Holloway 1973, Ruderman & Sutherland 1975, Rylov 1977, Michel 1979, Jackson 1980). Such a void exists in particular in the global axisymmetric model first proposed by Michel (1980) and later numerically computed by several groups (Krause-Polstorff & Michel 1985a, 1985b, Smith et al 2001, Pétri et al 2002, Spitkovsky & Arons 2002.…”

Section: Introductionmentioning

confidence: 99%

A stability property of a force-free surface bounding a vacuum gap

Aly¹

2005

A&A

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Abstract.A force-free surface (FFS) S is a sharp boundary separating a void from a region occupied by a charge-separated force-free plasma. It is proven here under very general assumptions that there is on S a simple relation between the charge density µ on the plasma side and the derivative of δ = E · B along B on the vacuum side (with E denoting the electric field and B the magnetic field). Combined with the condition δ = 0 on S, this relation implies that a FFS has a general stability property, already conjectured by Michel (1979, ApJ 227, 579): S turns out to attract charges placed on the vacuum side if they are of the same sign as µ. In the particular case of a FFS existing in the axisymmetric stationary magnetosphere of a "pulsar", the relation is given a most convenient form by using magnetic coordinates, and is shown to imply an interesting property of a gap. Also, a simple proof is given of the impossibility of a vacuum gap forming in a field B which is either uniform or radial (monopolar).

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Energetics of the aligned pulsar magnetosphere

Martin

1984

Astrophys Space Sci

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Finite force-free pulsar atmosphere models

Cited by 6 publications

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Theory of pulsar magnetosphere and wind

Theory of pulsar magnetosphere and wind

A stability property of a force-free surface bounding a vacuum gap

Energetics of the aligned pulsar magnetosphere

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