Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001dps....33.1421g&link_type=abstract
American Astronomical Society, DPS Meeting #33, #14.21; Bulletin of the American Astronomical Society, Vol. 33, p.1057
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Dust particles, like photons, are born at remote sites in space and time. From knowledge of the dust particles' birthplace, and the particles' bulk properties, we can learn about the remote environment out of which the particles were formed and how those particles have evolved physically and dynamically. Remote sensing and in-situ methods, combined with sample analysis and theory, allow us to make a global assessment of dust origin and production in our solar system and its context within the local interstellar environment. Born in the expanding atmospheres of high-luminosity stars or in supernova remnants, interstellar grains provide the seeds that grow in cool interstellar clouds by accretion of atoms and molecules and by agglomeration. Ultimately, interstellar grains can be incorporated in newly forming stars, or they can become part of planetary systems. Reborn from comets, asteroids, Kuiper belt objects and satellites, inter- and circumplanetary dust particles populate our own planetary system. Key issues addressed by space measurements are: - Determination of the total inventory of dust (size, composition, shape, spatial distribution, and temporal variations) in the Solar System. - Characterization and analysis of interstellar dust inside and outside the heliosphere. - Exploration of the dusty environments in the F-corona, near comets, in the asteroid belt and in the Kuiper belt. - Determination of sources, dynamics, and sinks of dust in planetary environs (from Mercury to Pluto). These issues will be supported by ground-based observations, theoretical modeling studies and laboratory measurements.
Grün Eberhard
Hahn Jinyong
Hamilton Dave
Harris William
Horanyi Mihaly
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