Results 141 to 150 of about 7,159 (168)

A Carbonate-Rich, Hydrated, Interplanetary Dust Particle: Possible Residue from Protostellar Clouds

Science, 1986
Transmission electron microscopy of a hydrated interplanetary dust particle (IDP) indicates that it contains abundant magnesium-iron carbonates, primarily breunnerite and magnesian siderite. This IDP displays a strong absorption band at 6.8 micrometers in its infrared spectrum, similar to that in certain protostellar spectra.
K, Tomeoka, P R, Buseck
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Nano-metric Dust Particles as a Hardly Detectable Component of the Interplanetary Dust Cloud

Journal of Astrophysics and Astronomy, 2015
The present work introduces the hypothesis of existence of a hardly detectable component of the interplanetary dust cloud and demonstrates that such a component is a dust formation consisting of the dust particles of nano-metric dimensions. This work describes the main physical properties of such a kind of nano-dust, and its possible chemical and ...
I. Simonia, Sh. Nabiyev
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The 3-Dimensional Structure of the Interplanetary Dust Cloud

1986
The three dimensional structure of the interplanetary dust cloud can be investigated by analysis of particle impacts and of zodiacal light. Optical models are presented and modifications by spatial variations of albedo are discussed. Relations between the spatial density and orbital inclinations of micrometeoroids provide the connection to the ULYSSES ...
R. H. Giese, G. Kinateder
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High-altitude water ice cloud formation on Mars controlled by interplanetary dust particles

Nature Geoscience, 2019
Submicrometre-size meteoric smoke aggregates form when interplanetary dust particles ablate and re-coagulate in the Martian atmosphere. The MAVEN (Mars Atmosphere and Volatile Evolution) satellite has detected pervasive ionized metallic layers due to meteor ablation at an 80–90 km altitude, which suggests a continuous supply of meteoric smoke particles
V. L Hartwick, O. B. Toon, N. G. Heavens
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Observational evidence for the scattering properties of interplanetary and cometary dust clouds: an update

Journal of Quantitative Spectroscopy and Radiative Transfer, 1999
Abstract Clouds of dust particles and aggregates in the solar system have been known, at least for a decade, to exhibit similar linear polarization phase curves, with a faint negative minimum at a small phase angle, and a wide maximum near 90°. More recently, data inversion techniques and observational campaigns have allowed us to obtain accurate ...
A.Chantal Levasseur-Regourd, Michel Cabane, Vincent Haudebourg   +2 more
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The Contribution of Asteroid Dust to the Interplanetary Dust Cloud: The Impact of ULYSSES Results on the Understanding of Dust Production in the Asteroid Belt and of the Formation of the IRAS Dust Bands

Icarus, 1996
Abstract Investigations of the zodiacal dust cloud give evidence for a significant contribution of asteroidal dust to the interplanetary dust cloud, a result which can now be compared to measurements of the ULYSSES dust detector during its passage of the asteroid belt.
Mann, I., Grün, E., Wilck, M.
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An analytical model for the mass distribution of the interplanetary dust cloud

Advances in Space Research, 2000
Abstract The mass dependence of the number density distribution for the interplanetary dust particles is discussed taking into account the particles' collisional process. From analytical estimations, it is found that the interplanetary dust cloud has two typical shapes of its number density distribution for particles with masses larger than 10 −12 g.
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Solar flare track densities in interplanetary dust particles: The determination of an asteroidal versus cometary source of the zodiacal dust cloud

Icarus, 1986
The possibility is explored whether an IDP (interplanetary dust particle) is cometary or asteroidal from measurements of the solar flare track density within its constituent mineral grains. Dust particles that are larger than 1 micron, when injected into the Solar System from comets and asteroids, will spiral into the sun due to the Poynting-Robertson ...
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Experimental simulations of optically thin clouds of dust by imaging polarimetry: application to comets and interplanetary dust.

2013
We use remote light scattering observations to tentatively infer the physical properties of the particles in cometary and interplanetary dust clouds. To interpret the results, numerical and experimental models are necessary. Laboratory scattering measurements on levitating particles with the PROGRA2 experiment -in dedicated microgravity flights or on ...
Hadamcik, Edith, Renard, Jean-Baptiste, Levasseur-Regourd, Anny Chantal, Lasue, Jérémie, Rietmeijer, F., Nuth Iii, J. A.   +5 more
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Inferring sources in the interplanetary dust cloud, from observations and simulations of zodiacal light and thermal emission.

2011
Interplanetary dust particles physical properties may be approached through observations of the solar light they scatter, specially its polarization, and of their thermal emission. Results, at least near the ecliptic plane, on polarization phase curves and on the heliocentric dependence of the local spatial density, albedo, polarization and temperature
Levasseur-Regourd, Anny Chantal, Lasue, Jérémie   +1 more
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