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
dor_id: 51601
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650.#.4.x: Físico Matemáticas y Ciencias de la Tierra
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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
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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
022.#.#.a: ISSN impreso: 0185-1101
310.#.#.a: Semestral
300.#.#.a: Páginas: 137-148
264.#.1.b: Instituto de Astronomía, UNAM
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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
last_modified: 2021-08-12 16:00:00
license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es
license_type: by-nc-nd
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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
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