Building a Weakly Outgassing Comet from a Generalized Ohm's Law

Переведенное название: Изучение распределения компонент обобщенного закона Ома в атмосфере слабой кометы

Jan Deca, Pierre Henri, Andrey Divin, Anders Eriksson, Marina Galand, Arnaud Beth, Katharina Ostaszewski, Mihály Horányi

Результат исследований: Научные публикации в периодических изданияхстатья

1 цитирование (Scopus)

Выдержка

When a weakly outgassing comet is sufficiently close to the Sun, the formation of an ionized coma results in solar wind mass loading and magnetic field draping around its nucleus. Using a 3D fully kinetic approach, we distill the components of a generalized Ohm's law and the effective electron equation of state directly from the self-consistently simulated electron dynamics and identify the driving physics in the various regions of the cometary plasma environment. Using the example of space plasmas, in particular multispecies cometary plasmas, we show how the description for the complex kinetic electron dynamics can be simplified through a simple effective closure, and identify where an isotropic single-electron fluid Ohm's law approximation can be used, and where it fails.

Язык оригиналаанглийский
Номер статьи055101
ЖурналPhysical Review Letters
Том123
Номер выпуска5
DOI
СостояниеОпубликовано - 1 авг 2019

Отпечаток

Ohms law
outgassing
comets
electrons
space plasmas
coma
kinetics
closures
solar wind
sun
equations of state
physics
nuclei
fluids
approximation
magnetic fields

Предметные области Scopus

  • Физика и астрономия (все)

Цитировать

Deca, J., Henri, P., Divin, A., Eriksson, A., Galand, M., Beth, A., ... Horányi, M. (2019). Building a Weakly Outgassing Comet from a Generalized Ohm's Law. Physical Review Letters, 123(5), [055101]. https://doi.org/10.1103/PhysRevLett.123.055101
Deca, Jan ; Henri, Pierre ; Divin, Andrey ; Eriksson, Anders ; Galand, Marina ; Beth, Arnaud ; Ostaszewski, Katharina ; Horányi, Mihály. / Building a Weakly Outgassing Comet from a Generalized Ohm's Law. В: Physical Review Letters. 2019 ; Том 123, № 5.
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Deca, J, Henri, P, Divin, A, Eriksson, A, Galand, M, Beth, A, Ostaszewski, K & Horányi, M 2019, 'Building a Weakly Outgassing Comet from a Generalized Ohm's Law', Physical Review Letters, том. 123, № 5, 055101. https://doi.org/10.1103/PhysRevLett.123.055101

Building a Weakly Outgassing Comet from a Generalized Ohm's Law. / Deca, Jan; Henri, Pierre; Divin, Andrey; Eriksson, Anders; Galand, Marina; Beth, Arnaud; Ostaszewski, Katharina; Horányi, Mihály.

В: Physical Review Letters, Том 123, № 5, 055101, 01.08.2019.

Результат исследований: Научные публикации в периодических изданияхстатья

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AU - Deca, Jan

AU - Henri, Pierre

AU - Divin, Andrey

AU - Eriksson, Anders

AU - Galand, Marina

AU - Beth, Arnaud

AU - Ostaszewski, Katharina

AU - Horányi, Mihály

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AB - When a weakly outgassing comet is sufficiently close to the Sun, the formation of an ionized coma results in solar wind mass loading and magnetic field draping around its nucleus. Using a 3D fully kinetic approach, we distill the components of a generalized Ohm's law and the effective electron equation of state directly from the self-consistently simulated electron dynamics and identify the driving physics in the various regions of the cometary plasma environment. Using the example of space plasmas, in particular multispecies cometary plasmas, we show how the description for the complex kinetic electron dynamics can be simplified through a simple effective closure, and identify where an isotropic single-electron fluid Ohm's law approximation can be used, and where it fails.

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KW - Electron dynamics

KW - Equation of state

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Deca J, Henri P, Divin A, Eriksson A, Galand M, Beth A и соавт. Building a Weakly Outgassing Comet from a Generalized Ohm's Law. Physical Review Letters. 2019 Авг. 1;123(5). 055101. https://doi.org/10.1103/PhysRevLett.123.055101