Estimation of micrometeorites and satellite dust flux surrounding Mars in the light of MAVEN results

Pabari, Jayesh; Bhalodi, Pinali

doi:10.1016/j.icarus.2017.01.023

Cited by 8 publications

(3 citation statements)

References 18 publications

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“…For example the MAVEN spacecraft observed dust particle impacts using impact plasma generated voltage spikes, but these dust impacts were coming from interplanetary space and were in accordance with nominal Zodiacal Cloud dust models (Andersson et al 2015). Additionally, there is no evidence for dust activity at either of Mars' moons Phobos and Deimos (Pabari & Bhalodi 2017). We pursue the hypothetical Martian dust for the sake of completeness and to potentially find a missing piece of the dust complex which was proposed to explain the STE observations (Jorgensen et al 2021).…”

Section: Impacts Of Dust Generated By Mars and Its Moonsmentioning

confidence: 93%

Modeling Meteoroid Impacts on the Juno spacecraft

Pokorný,

Szalay,

Horányi

et al. 2022

Preprint

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Events which meet certain criteria from star tracker images onboard the Juno spacecraft have been proposed to be due to interplanetary dust particle impacts on its solar arrays. These events have been suggested to be caused by particles with diameters larger than 10 micrometers. Here, we compare the reported event rates to expected dust impact rates using dynamical meteoroid models for the four most abundant meteoroid/dust populations in the inner solar system. We find that the dust impact rates predicted by dynamical meteoroid models are not compatible with either the Juno observations in terms of the number of star tracker events per day, or with the variations of dust flux on Juno's solar panels with time and position in the solar system. For example, the rate of star tracker events on Juno's anti-sunward surfaces is the largest during a period during which Juno is expected to experience the peak impact fluxes on the opposite, sunward hemisphere. We also investigate the hypothesis of dust leaving the Martian Hill sphere originating either from the surface of Mars itself or from one of its moons. We do not find such a hypothetical source to be able to reproduce the star tracker event rate variations observed by Juno. We conclude that the star tracker events observed by Juno are unlikely to be the result of instantaneous impacts from the Zodiacal Cloud.

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Section: Impacts Of Dust Generated By Mars and Its Moonsmentioning

confidence: 93%

Modeling Meteoroid Impacts on the Juno spacecraft

Pokorný,

Szalay,

Horányi

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Additionally, there is no evidence for dust activity at either of Mars' moons, Phobos and Deimos (Pabari & Bhalodi 2017). We pursue the hypothetical Martian dust for the sake of completeness and to potentially find a missing piece of the dust complex which was proposed to explain the STE observations (Jorgensen et al 2021).…”

Section: Impacts Of Dust Generated By Mars and Its Moonsmentioning

confidence: 99%

Modeling Meteoroid Impacts on the Juno Spacecraft

et al. 2022

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Events which meet certain criteria from star-tracker images on board the Juno spacecraft have been proposed to be due to interplanetary dust particle impacts on its solar arrays. These events have been suggested to be caused by particles with diameters larger than 10 μm. Here, we compare the reported event rates to expected dust-impact rates using dynamical meteoroid models for the four most abundant meteoroid/dust populations in the inner solar system. We find that the dust-impact rates predicted by dynamical meteoroid models are not compatible with either the Juno observations in terms of the number of star-tracker events per day, or with the variations of dust flux on Juno’s solar panels with time and position in the solar system. For example, the rate of star-tracker events on Juno’s antisunward surfaces is the largest during a period in which Juno is expected to experience the peak impact fluxes on the opposite, sunward hemisphere. We also investigate the hypothesis of dust leaving the Martian Hill sphere originating either from the surface of Mars itself or from one of its moons. We do not find such a hypothetical source to be able to reproduce the star-tracker event-rate variations observed by Juno. We conclude that the star-tracker events observed by Juno are unlikely to be the result of instantaneous impacts from the zodiacal cloud.

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“…Even in absence of storms during the quiet period of the year, dust optical depth remains relatively large (~0.5). While the lower atmosphere is dominated by the dust lifted from the Martian surface, dust found in the upper atmosphere originates predominantly from interplanetary sources and partly from the planet's natural satellites (i.e., Phobos and Deimos) (Andersson et al, 2015; Pabari & Bhalodi, ). Earlier observations of the spatial and seasonal changes of the dust (e.g., Briggs et al, ; Thorpe, , and references therein) have shown that typical regional dust storms always occur when Mars is near its perihelion, while the occurrence of global dust storms (e.g., dust storm observed by Viking in 1971 and 1972) is quite rare—unlike global dust storms, the planet‐encircling dust events are observed to occur every 3–4 Martian years.…”

Section: Introductionmentioning

confidence: 99%

Effects of Global and Regional Dust Storms on the Martian Hot O Corona and Photochemical Loss

et al. 2020

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We examine here for the first time the effects of both global and regional dust storms on the formation of the Martian hot O corona and associated photochemical loss of O. Our study is conducted by utilizing our integrated model framework, which couples our Martian hot O corona model with a multifluid magnetohydrodynamic model for Mars for the dusty and clear atmospheric condition cases. We present our results with the most up-to-date cross sections for the O( 3 P)-CO 2 collisions. The main effect of dust storms on the ionosphere is the upward shift of the ionosphere on the dayside, which results in an increase in production of hot O at all altitudes above the ionospheric peak. However, the dust-induced inflation of the neutral upper atmosphere results in an enhancement in collisional loss of hot O and thus effectively suppresses the hot O density, reducing the global photochemical loss rate by~28% for the global dust storm scenario. The relative density structure of the hot O corona does not show any significant changes, while its magnitude decreases at all altitudes.

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Estimation of micrometeorites and satellite dust flux surrounding Mars in the light of MAVEN results

Cited by 8 publications

References 18 publications

Modeling Meteoroid Impacts on the Juno spacecraft

Modeling Meteoroid Impacts on the Juno spacecraft

Modeling Meteoroid Impacts on the Juno Spacecraft

Effects of Global and Regional Dust Storms on the Martian Hot O Corona and Photochemical Loss

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