منابع مشابه
Migration of interplanetary dust.
We numerically investigate the migration of dust particles with initial orbits close to those of the numbered asteroids, observed trans-Neptunian objects, and comet Encke. The fraction of silicate asteroidal particles that collided with the Earth during their lifetime varied from 11% for 100 micron particles to 0.008% for 1 micron particles. Almost all asteroidal particles with diameter d >/= 4...
متن کاملInterplanetary Dust Community
Imagine a box filled with particles from hundreds of thousands of small bodies throughout the solar system, including asteroids, comets, Trojans, Centaurs, KBOs and even from other stars. Each particle contains information about the object from which it came and the space environment through which it has traveled. Largely collected near the Earth’s orbit and on the Earth itself, this box of par...
متن کاملIon Bombardment of Interplanetary Dust
The recent discovery of ion tracks in interplanetary dust and the increasing evidence for carbon and carburized materials in these objects are strongly suggestive that chemical processing by energetic charged-particle bombardment has occurred during the dust lifetimes. The track density gives a measure of the total ion fluence experienced by the grains. We use this information and laboratory da...
متن کاملThe fate of sub-micron circumplanetary dust grains II: Multipolar fields
We study the radial and vertical stability of dust grains launched with all charge-to-mass ratios at arbitrary distances from rotating planets with complex magnetic fields. We show that the aligned dipole magnetic field model analyzed by Jontof-Hutter and Hamilton (2012) is an excellent approximation in most cases, but that fundamentally new physics arises with the inclusion of non-axisymmetric...
متن کاملMicron Dust Emission from High Redshift Objects
We report observations of a sample of high redshift sources (1.8 ∼< z ∼< 4.7), mainly radio-quiet quasars, at 350μm using the SHARC bolometer camera at the Caltech Submillimeter Observatory. Nine sources were detected (∼> 4σ) and upper limits were obtained for 11 with 350μm flux density limits (3 σ) in the range 30 125mJy. Combining published results at other far-infrared and millimeter wavelen...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1976
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/177.1.117p