Dust in the planetary system: Dust interactions in space plasmas of the solar system

Mann, Ingrid; Meyer‐Vernet, N.; Czechowski, A.

doi:10.1016/j.physrep.2013.11.001

Cited by 75 publications

(63 citation statements)

References 197 publications

(273 reference statements)

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“…[7,16,18,19] Even small amounts of high-energy particles change the charge balance. [7,16,18,19] Even small amounts of high-energy particles change the charge balance.…”

Section: Dust Charging In Detailmentioning

confidence: 99%

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Radar studies of ionospheric dusty plasma phenomena

Mann

Gunnarsdottir

Häggström

et al. 2019

Contributions to Plasma Physics

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We discuss the influence of charged dust on radar observations in the Earth ionosphere. This region in the upper Earth atmosphere can be described as a partially ionized, low-temperature plasma. Plasma parameters vary by orders of magnitude spatially and in time. Dust particles influence the charge balance, in some cases dusty plasma condition is met. The polar mesospheric echoes are an example of dust plasma interactions observed with radar. The mesosphere is a region where atmospheric temperature decreases with altitude and can reach frost point temperature.The formation of the polar mesospheric radar echoes involves neutral atmosphere dynamics, which is latitude dependent and it involves charged dust particles, especially icy dust that forms in the polar summer mesosphere. Charged dust can also influence incoherent scatter that results from electromagnetic waves scattering off electrons, where the electrons are coupled to other charged components. Observers rarely report charged dust signatures in the incoherent scatter spectra; we show that there is a good chance for doing so with improved observations. The incoherent scatter can possibly also be used to estimate the amount of charged dust in the direct vicinity of a meteor, as we show based on the order of magnitude considerations. This prospect of new observational results makes theoretical investigations of radio-wave scattering in the presence of charged dust with size distributions worthwhile.

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“…[7,16,18,19] Even small amounts of high-energy particles change the charge balance. [7,16,18,19] Even small amounts of high-energy particles change the charge balance.…”

Section: Dust Charging In Detailmentioning

confidence: 99%

“…[7,16,18,19] Even small amounts of high-energy particles change the charge balance. [19] Impacts of photons cause photo-electron emission when the photon energy is greater than the work function of the dust material. They lead to secondary electron emission, which in addition is influenced by small particle effects.…”

Section: Dust Charging In Detailmentioning

confidence: 99%

Radar studies of ionospheric dusty plasma phenomena

Mann

Gunnarsdottir

Häggström

et al. 2019

Contributions to Plasma Physics

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“…If significant, the resulting current must be taken into account to determine the grain's net charge from the steady-state balance of currents to its surface. For dust grains, electron field emission becomes a significant process when a critical electric field strength at the grain's surface is reached E fe = φ/a 10 7 V cm −1 (Gomer 1961;Axford & Mendis 1974;Draine & Salpeter 1979;Ishihara 2007;Mann et al 2014), where φ is the grain potential and a is the radius of the dust grain. This value is calculated from the Fowler-Nordheim equation, which determines the electron current drawn from a conducting dust grain with a work function, W f (typically W f = 1−5 eV).…”

Section: Criteria For Electrostatic Disruption Of Spherical Dust Grainsmentioning

confidence: 99%

Inhomogeneous cloud coverage through the Coulomb explosion of dust in substellar atmospheres

Stark

Helling

Diver

2015

A&A

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Context. Recent observations of brown dwarf spectroscopic variability in the infrared infer the presence of patchy cloud cover. Aims. This paper proposes a mechanism for producing inhomogeneous cloud coverage due to the depletion of cloud particles through the Coulomb explosion of dust in atmospheric plasma regions. Charged dust grains Coulomb-explode when the electrostatic stress of the grain exceeds its mechanical tensile stress, which results in grains below a critical radius a < a Coul crit being broken up. Methods. This work outlines the criteria required for the Coulomb explosion of dust clouds in substellar atmospheres, the effect on the dust particle size distribution function, and the resulting radiative properties of the atmospheric regions. Results. Our results show that for an atmospheric plasma region with an electron temperature of T e = 10 eV (≈10 5 K), the critical grain radius varies from 10 −7 to 10 −4 cm, depending on the grains' tensile strength. Higher critical radii up to 10 −3 cm are attainable for higher electron temperatures. We find that the process produces a bimodal particle size distribution composed of stable nanoscale seed particles and dust particles with a ≥ a Coul crit , with the intervening particle sizes defining a region devoid of dust. As a result, the dust population is depleted, and the clouds become optically thin in the wavelength range 0.1-10 μm, with a characteristic peak that shifts to higher wavelengths as more sub-micrometer particles are destroyed. Conclusions. In an atmosphere populated with a distribution of plasma volumes, this will yield regions of contrasting radiative properties, thereby giving a source of inhomogeneous cloud coverage. The results presented here may also be relevant for dust in supernova remnants and protoplanetary disks.

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“…The nanodust originates most likely from the 308 DIVISION E COMMISSION 49 inner heliosphere and reaches, near AU velocities of the same order as the solar wind velocity (Czechowski & Mann(2010), Czechowski & Mann(2012)). The acceleration bears some simillarities to the ion pick-up process and a basic understanding of the nanodust dynamics in the solar wind and at the edge of the heliosphere can be obtained from applying the guiding center approximation (Mann et al (2014)), while more detailed studies are in progress. In spite of the large velocity the nanodust momentum flux in the solar wind is small and for instance it does not influence the magnetosphere of the Earth (Mann & Hamrin(2013)).…”

Section: Interstellar and Interplanetary Dust In The Heliospherementioning

confidence: 99%

“…Another analysis of the measurements between 1992 and 2007 has now been published in a series of papers again , Strub et al (2015), Krüger et al (2015)). Recent model calculations show that interstellar dust trajectories at the edge of the heliosphere strongly depend on solar wind magnetic field polarity (Slavin et al (2012), Mann et al (2014)). During the last couple of years several instruments on spacecraft detected dust impacts with field measurements.…”

Section: Interstellar and Interplanetary Dust In The Heliospherementioning

confidence: 99%

Division E Commission 49: Interplanetary Plasma and Heliosphere

Mann¹,

Manoharan²,

Gopalswamy³

et al. 2015

Proc. IAU

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Abstract. After a little more than forty years of work related to the interplanetary plasma and the heliosphere the IAU's Commission 49 was formally discontinued in 2015. The commission started its work when the first spacecraft were launched to measure the solar wind in-situ away from Earth orbit, both inward and outward from 1 AU. It now hands over its activities to a new commission during an era of space research when Voyager 1 measures in-situ the parameters of the local interstellar medium at the edge of the heliosphere. The commission will be succeeded by C.E3 with a similar area of responsibility but with more focused specific tasks that the community intends to address during the coming several years. This report includes a short description of the motivation for this commission and of the historical context. It then describes work from 2012 to 2015 during the present solar cycle 24 that has been the weakest in the space era so far. It gave rise to a large number of studies on solar energetic particles and cosmic rays. Other studies addressed e.g. the variation of the solar wind structure and energetic particle fluxes on long time scales, the detection of dust in the solar wind and the Voyager measurements at the edge of the heliosphere. The research is based on measurements from spacecraft that are at present operational and motivated by the upcoming Solar Probe + and Solar Orbiter missions to explore the vicinity of the Sun. We also report here the progress on new and planned radio instruments and their importance for heliospheric studies. Contributors to this report are

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Dust in the planetary system: Dust interactions in space plasmas of the solar system

Cited by 75 publications

References 197 publications

Radar studies of ionospheric dusty plasma phenomena

Radar studies of ionospheric dusty plasma phenomena

Inhomogeneous cloud coverage through the Coulomb explosion of dust in substellar atmospheres

Division E Commission 49: Interplanetary Plasma and Heliosphere

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