A dynamical model of the sporadic meteoroid complex

Wiegert, Paul; Vaubaillon, Jérémie; Campbell-Brown, M.

doi:10.1016/j.icarus.2008.12.030

Cited by 94 publications

(145 citation statements)

References 41 publications

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“…In this section we report the values of vapor and neutral atoms production rates obtained by considering -LB and G calibrations; -the percentages of cometary and asteroidal components expected to come from low eccentricity and low inclination orbits (Dermott et al 2002;Wiegert et al 2009); -the surface compositions provided by Cremonese et al (2005); Goettel (1988) and Smith and Marconi (1995). Notes.…”

Section: Resultsmentioning

confidence: 99%

“…Notes. Here we consider the estimate of the flux given by Cintala (1992) tuned by the fraction of dust of asteroidal origin given by Dermott et al (2002) and Wiegert et al (2009), respectively. The assumed mineralogical surface composition follows from Cremonese et al (2005).…”

Section: Resultsmentioning

confidence: 99%

“…According to some authors (Dermott et al 2002), the dust collected from satellite LDEF (Love & Brownlee 1993) comes from typical asteroidal orbits, but a recent model of dust claims that a fraction as high as 90% might come from both short and long period comets (Wiegert et al 2009). The flux values of BM reported in Table 2 were obtained by considering dust reaching the Earth on orbits initially placed on the inner edge of the asteroid belt with low values of eccentricity and inclination.…”

Section: Calibration Of the Modelmentioning

confidence: 99%

“…One component approaches the Earth on low eccentricity and low inclination orbits as those modelled by BM and it is possibly coming from the asteroid belt and some short period comets (Dermott et al 2002). The second component, characterized by high impact velocities, would originate from comets with high values of eccentricity and inclination (Wiegert et al 2009). The flux estimate given by BM is relative to the first component and a tuning coefficient is needed to evaluate the flux on Mercury derived by this component once calibrated to the LDEF data.…”

Section: Calibration Of the Modelmentioning

confidence: 99%

“…The first is based on the data from Love & Brownlee (1993) (as done in BM), while the second is based on data by Grün et al (1985), hereafter LB and G respectively. Moreover, we give different values of the vapor production rates, taking into account the different balance between asteroidal and cometary sources of dust particles (Wiegert et al 2009;Dermott et al 2002). We consider three types of surface composition with different mass fraction of atoms in the regolith of the planet Goettel 1988;Smith & Marconi 1995).…”

Section: Introductionmentioning

confidence: 99%

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Estimate of the neutral atoms' contribution to the Mercury exosphere caused by a new flux of micrometeoroids

Borin¹,

Bruno

Cremonese³

et al. 2010

A&A

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Context. The planet Mercury has an extended and tenuous exosphere made up of atoms that are ejected from the surface by energetic processes, including hypervelocity micrometeoritic impacts, photon-stimulated desorption by UV radiation, and ion sputtering. The well known constituents of the Hermean exosphere are H, He, O, Na, K, and Ca but, from the new MESSENGER data from flybys, many others elements are expected, as for instance Mg. Aims. Meteoroid impacts are an important source of neutral atoms in the exosphere of Mercury. We estimate the vapor and neutral atom production rates on Mercury caused by impacts of micrometeoroids of sizes between 5-100 μm. The micrometeoritic flux is derived from a new statistical approach based on direct numerical integrations of dust particle trajectories under the action of the Poynting-Robertson drag and the gravitational attraction of all planets. Methods. We included two different calibration sources for the meteoroid flux in our calculations of the vapor and neutral atoms and also considered both asteroidal and cometary sources for the dust. Three different surface compositions, which might be found on the planet, have been adopted, each with a different mass fraction of atoms in the regolith of the planet. Results. We derive different values of neutral atom vapor production rates assuming different calibration sources for the meteoroid flux. The three simple mineralogical surface compositions show significant differences in the related production rates, and they are all greater than those reported in the previous papers assuming other dominant source mechanisms. Our neutral atom production rates are about one order of magnitude higher than the previous estimates. This implies that the impact vaporization has a much higher contribution than previously assumed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Calibration Of the Modelmentioning

confidence: 99%

Section: Calibration Of the Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimate of the neutral atoms' contribution to the Mercury exosphere caused by a new flux of micrometeoroids

Borin¹,

Bruno

Cremonese³

et al. 2010

A&A

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Interferometric meteor head echo observations using the Southern Argentina Agile Meteor Radar

et al. 2014

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A radar meteor echo is the radar scattering signature from the free electrons generated by the entry of extraterrestrial particles into the atmosphere. Three categories of scattering mechanisms exist: specular, nonspecular trails, and head echoes. Generally, there are two types of radars utilized to detect meteors. Traditional VHF all‐sky meteor radars primarily detect the specular trails, while high‐power, large‐aperture (HPLA) radars efficiently detect meteor head echoes and, in some cases, nonspecular trails. The fact that head echo measurements can be performed only with HPLA radars limits these studies in several ways. HPLA radars are sensitive instruments constraining the studies to the lower masses, and these observations cannot be performed continuously because they take place at national observatories with limited allocated observing time. These drawbacks can be addressed by developing head echo observing techniques with modified all‐sky meteor radars. Such systems would also permit simultaneous detection of all different scattering mechanisms using the same instrument, rather than requiring assorted different classes of radars, which can help clarify observed differences between the different methodologies. In this study, we demonstrate that such concurrent observations are now possible, enabled by the enhanced design of the Southern Argentina Agile Meteor Radar (SAAMER). The results presented here are derived from observations performed over a period of 12 days in August 2011 and include meteoroid dynamical parameter distributions, radiants, and estimated masses. Overall, the SAAMER's head echo detections appear to be produced by larger particles than those which have been studied thus far using this technique.

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Annual variation and synodic modulation of the sporadic meteoroid flux to the Moon

Szalay

Horányi

2015

Geophysical Research Letters

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The Lunar Dust Experiment on board NASA's Lunar Atmosphere and Dust Environment Explorer discovered a permanently present, asymmetric dust cloud engulfing the Moon, sustained by meteoroid bombardment. It is most dense at 5–8 lunar local time, with a peak density canted sunward. Here we present analysis on the variation of the cloud density during January to April 2014. We find the lunar dust cloud in the Moon's equatorial plane to be dominantly produced by impacts from three known sporadic meteoroid sources: apex, helion, and antihelion, listed in order of their contribution to ejecta production. The cloud density is also modulated by the Moon's orbital motion about the Earth, peaking during its waning gibbous phase. These results are complementary to ground‐based measurements and indicate the Moon can be used as a very sensitive large area dust detector to characterize the meteoroid environment at 1 AU.

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A dynamical model of the sporadic meteoroid complex

Cited by 94 publications

References 41 publications

Estimate of the neutral atoms' contribution to the Mercury exosphere caused by a new flux of micrometeoroids

Estimate of the neutral atoms' contribution to the Mercury exosphere caused by a new flux of micrometeoroids

Interferometric meteor head echo observations using the Southern Argentina Agile Meteor Radar

Annual variation and synodic modulation of the sporadic meteoroid flux to the Moon

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