Ions of martian origin and plasma sheet in the martian magnetosphere: initial results of the TAUS experiment

Rosenbauer, H.; Shutte, N. M.; Apáthy, I.; Galeev, A. A.; Gringauz, K. I.; Grünwaldt, H.; Hemmerich, Peter; Jockers, K.; Király, Péter; Котова, Г. А.; Livi, S.; Marsch, E.; Richter, A. K.; Riedler, W.; Remizov, T.; Schwenn, R.; Schwingenschuh, K.; Steller, M.; Szegö, K.; Веригин, М. И.; Witte, M.

doi:10.1038/341612a0

Cited by 157 publications

(89 citation statements)

References 3 publications

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“…These published values were nearly two orders of magnitude lower than earlier estimates based on data from observations obtained with instruments from the Phobos spacecraft [Lundin et al, 1989;Rosenbauer et al, 1989;Verigin et al, 1991]. Therefore it is timely to again look at model calculations of these fluxes.…”

Section: Introductioncontrasting

confidence: 38%

Ion escape fluxes from Mars

Nagy

2007

Geophysical Research Letters

111

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[1] A 3D, multi-species, non-ideal MHD numerical code was used to calculate the ion escape fluxes from Mars. The calculations were carried out for six cases with different nominal solar wind, solar cycle and crustal field orientation conditions and the total escape fluxes (the sum of the three major ionospheric species, O + , O 2 + , and CO 2 + ) varied by about an order of magnitude from 2.7 Â 10 23 to 2.4 Â 10 24 sec À1 . These results were compared to the recently measured Mars Express results of 3.2 Â 10 23 sec À1 (O + , O 2 + , and CO 2 + ), which were obtained near solar cycle minimum conditions, indicating a good agreement between measured and calculated fluxes. We also calculated the escape flux for ''extremely'' high solar wind conditions which leads to a flux of 3 Â 10 25 sec À1 .

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Section: Introductioncontrasting

confidence: 38%

Ion escape fluxes from Mars

Nagy

2007

Geophysical Research Letters

111

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“…Measurements carried out on the Phobos-2 spacecraft have shown that the plasma tail of Mars consists mainly of ions of planetary origin (Lundin et al, 1989a, b;Rosenbauer et al, 1989). Lundin et al (1989aLundin et al ( , b, 1990 estimated that the planet is losing oxygen at a rate of about 3 × 10 25 ions/ s. This value is sufficiently high to explain a dehydration of Mars on a cosmogonic time scale.…”

Section: Introductionmentioning

confidence: 62%

Model calculations of the planetary ion distribution in the Martian tail

Lichtenegger

Dubinin

2014

Earth Planet Sp

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Based on a recent model of the Martian atmosphere/exosphere and a model of the magnetic field and solar wind flow around Mars, the distribution of different planetary ion species in the near tail is calculated. Three main regions are identified: 1) "clouds" of pickup ions with distinct mass separation travel along cycloidal trajectories; 2) another group of ions forms a distinct plasma mantle in the magnetosphere; 3) a third population fills up the plasma sheet. Further, the energy of ions in different locations is also analyzed. Finally, comparison of observations made onboard the Phobos-2 spacecraft shows a reasonable agreement with simulation results.

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“…In one-to-one SLED data/hybrid model comparisons to be made in future, it will be necessary to use realistic upstream parameters in the hybrid model runs. Fortunately, such solar wind plasma parameters are already available in the contemporaneous data of the ASPERA and TAUS instruments flown aboard Phobos-2 (Lundin et al, 1989;Rosenbauer et al, 1989) and complementary magnetic field measurements made by the onboard MAG instrument are also available (Riedler et al, 1989). In future one-to-one comparisons between the in situ measurements and the simulations, the upstream parameters, especially the IMF, should remain unaltered so that the simulated electromagnetic field environment can correspond to the real conditions.…”

Section: Analysis Of the Sled Datamentioning

confidence: 99%

Magnetic shadowing of high energy ions at Mars and how this effect can be simulated using a hybrid model

et al. 2012

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Energetic particle data recorded by the SLED instrument aboard Phobos-2 while in circular orbit about Mars (6-26 March, 1989) showed the presence of magnetic shadowing. A 3-D, self consistent, hybrid model (HYBMars) supplemented by test particle simulations was developed to study the response of the Martian plasma environment to solar disturbances and to reproduce, in particular, the magnetic shadowing effect. The pertaining magnetic and electric fields as well as the properties of high energy ions present at Mars under conditions of extreme solar disturbances, can be derived from HYB-Mars. This model predicted a plasma phenomenon at the planet, named here 'solar wind-flow shadowing', which was earlier identified in the measurements of the ASPERA (plasma) experiment aboard Phobos-2. HYB also predicted magnetic shadowing which is qualitatively similar to that recorded by SLED. The simulations suggest that the configuration of a magnetic shadow depends on the pertaining solar wind density and velocity, and on the magnitude and direction of the interplanetary magnetic field. It is currently planned to input to the HYB model plasma and magnetic field data measured contemporaneously with the particle measurements aboard Phobos-2 so as to more realistically match the simulated results with the in situ observations.

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Ions of martian origin and plasma sheet in the martian magnetosphere: initial results of the TAUS experiment

Cited by 157 publications

References 3 publications

Ion escape fluxes from Mars

Ion escape fluxes from Mars

Model calculations of the planetary ion distribution in the Martian tail

Magnetic shadowing of high energy ions at Mars and how this effect can be simulated using a hybrid model

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