dor_id: 51601

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856.4.0.u: http://www.revistas.unam.mx/index.php/revmexaa/article/view/31419/29749

100.1.#.a: Aceves, H.; Reyes Ruiz, M.; Chavez, C. E.

524.#.#.a: Aceves, H., et al. (2012). Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars. Revista Mexicana de Astronomía y Astrofísica; Vol 48, No 1, 2012; 137-148. Recuperado de https://repositorio.unam.mx/contenidos/51601

245.1.0.a: Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Astronomía, UNAM

264.#.0.c: 2012

264.#.1.c: 2012-04-24

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041.#.7.h: eng

520.3.#.a: We study some of the effects that magnetic turbulent fluctuations have on the dynamics of pickup O+ ions in the magnetic polar regions of the Mars ionosheath. In particular we study their effect on the bulk velocity profiles of ions as a function of altitude over the magnetic poles, in order to compare them with recent Mars Express data; that indicate that their average velocity is very low and essentially in the anti-sunward direction. We find that, while magnetic field fluctuations do give rise to deviations from simple E × B-drift gyromotion, even fluctuation amplitudes much greater than those of in situ measurements are not able to reproduce the vertical velocity profile of O+ ions. We conclude that other physical mechanisms, different from a pure charged particle dynamics, are acting on pickup ions at the Martian terminator. A possibility is a viscous-like interaction between the Solar Wind and the Martian ionosphere at low altitudes.We study some of the effects that magnetic turbulent fluctuations have on the dynamics of pickup O+ ions in the magnetic polar regions of the Mars ionosheath. In particular we study their effect on the bulk velocity profiles of ions as a function of altitude over the magnetic poles, in order to compare them with recent Mars Express data; that indicate that their average velocity is very low and essentially in the anti-sunward direction. We find that, while magnetic field fluctuations do give rise to deviations from simple E × B-drift gyromotion, even fluctuation amplitudes much greater than those of in situ measurements are not able to reproduce the vertical velocity profile of O+ ions. We conclude that other physical mechanisms, different from a pure charged particle dynamics, are acting on pickup ions at the Martian terminator. A possibility is a viscous-like interaction between the Solar Wind and the Martian ionosphere at low altitudes.

773.1.#.t: Revista Mexicana de Astronomía y Astrofísica; Vol 48, No 1 (2012); 137-148

773.1.#.o: http://www.revistas.unam.mx/index.php/revmexaa/index

046.#.#.j: 2021-08-03 00:00:00.000000

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300.#.#.a: Páginas: 137-148

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harvesting_date: 2019-02-06 00:00:00.0

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245.1.0.b: Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars

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Artículo

Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars

Aceves, H.; Reyes Ruiz, M.; Chavez, C. E.

Instituto de Astronomía, UNAM, publicado en Revista Mexicana de Astronomía y Astrofísica, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Cita

Aceves, H., et al. (2012). Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars. Revista Mexicana de Astronomía y Astrofísica; Vol 48, No 1, 2012; 137-148. Recuperado de https://repositorio.unam.mx/contenidos/51601

Descripción del recurso

Autor(es)
Aceves, H.; Reyes Ruiz, M.; Chavez, C. E.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Effects of Magnetic Turbulence on the Dynamics of Pickup Ions in the Ionosheath of Mars
Fecha
2012-04-24
Resumen
We study some of the effects that magnetic turbulent fluctuations have on the dynamics of pickup O+ ions in the magnetic polar regions of the Mars ionosheath. In particular we study their effect on the bulk velocity profiles of ions as a function of altitude over the magnetic poles, in order to compare them with recent Mars Express data; that indicate that their average velocity is very low and essentially in the anti-sunward direction. We find that, while magnetic field fluctuations do give rise to deviations from simple E × B-drift gyromotion, even fluctuation amplitudes much greater than those of in situ measurements are not able to reproduce the vertical velocity profile of O+ ions. We conclude that other physical mechanisms, different from a pure charged particle dynamics, are acting on pickup ions at the Martian terminator. A possibility is a viscous-like interaction between the Solar Wind and the Martian ionosphere at low altitudes.We study some of the effects that magnetic turbulent fluctuations have on the dynamics of pickup O+ ions in the magnetic polar regions of the Mars ionosheath. In particular we study their effect on the bulk velocity profiles of ions as a function of altitude over the magnetic poles, in order to compare them with recent Mars Express data; that indicate that their average velocity is very low and essentially in the anti-sunward direction. We find that, while magnetic field fluctuations do give rise to deviations from simple E × B-drift gyromotion, even fluctuation amplitudes much greater than those of in situ measurements are not able to reproduce the vertical velocity profile of O+ ions. We conclude that other physical mechanisms, different from a pure charged particle dynamics, are acting on pickup ions at the Martian terminator. A possibility is a viscous-like interaction between the Solar Wind and the Martian ionosphere at low altitudes.
Idioma
eng
ISSN
ISSN impreso: 0185-1101

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