Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-26T04:41:13.406Z Has data issue: false hasContentIssue false
  • English
  • Français

5.10 Are Interplanetary Grains Crystalline?

Published online by Cambridge University Press:  12 April 2016

S. Drapatz  and
K.W. Michel
S. Drapatz
Affiliation:
Max-Planck-Institut für Physik und Astrophysik, Institut für extraterrestrische Physik, 8046 Garching, W.-Germany
K.W. Michel
Affiliation:
Max-Planck-Institut für Physik und Astrophysik, Institut für extraterrestrische Physik, 8046 Garching, W.-Germany

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The optical properties of interplanetary grains depend not only on chemical composition, size, and shape but also on lattice defects. It is argued that practically all sources for the zodiacal dust cloud yield grains with highly disturbed crystal structure. Healing of these defects can occur when the grains are heated in the vicinity of the sun (≤0.1 AU) and various orbits are considered, on which annealed grains with nearly perfect crystal structure can return to larger heliocentric distances to reveal the sharp optical features of cold well-ordered crystals. However, we do not find any processes, which produce healed particles of sufficient number to affect the properties of the general zodiacal cloud. Therefore, the optical properties of interplanetary grains are determined by a high degree of lattice perturbation.

Type
5 Dynamics and Evolution
Information
International Astronomical Union Colloquium , Volume 31: Interplanetary Dust and Zodiacal Light , 1976 , pp. 464 - 468
Copyright
Copyright © Springer-Verlag 1976

References

Allen, C.W.A., Astrophysical Quantities, Athlone Press (1973)Google Scholar
Biermann, L., private communication (1975)Google Scholar
Dohnanyi, J.S., this volume. 1976 Google Scholar
Drapatz, S., and Michel, K.W., Naturf, Z.. 29a, 870 (1974)CrossRefGoogle Scholar
Drapatz, S., and Michel, K.W., Workshop on Interstellar Grains, Gregynog Hall, Wales (1975)Google Scholar
Elsässer, H., NASA SP-150 p. 287 (1967)Google Scholar
Gault, D.E., et al., NASA TN D-1767 (1963)Google Scholar
Harwit, M., J. Geophys. Res. 68, 2171 (1963)CrossRefGoogle Scholar
Hines, R.L., Phys. Rev. 120, 1626 (1960)Google Scholar
Huffman, D.R., private communication (1975)Google Scholar
Lamy, Ph.L., Astr. Astrophys. 13, 191 (1974)Google Scholar
Perry, C.H., et al., The Moon 4, 315 (1972)CrossRefGoogle Scholar
Pollack, J.B., et al., Icarus 19, 372 (1973)Google Scholar
Schott, , “Schott-Zerodur”, Mainz (1971)Google Scholar
Wetherill, G.W., J. Geophys. Res. 72, 2429 (1967)Google Scholar
Wigley, D.A., “Mechanical Properties of Material at Low Temperatures” Plenum Press N.Y. (1971)CrossRefGoogle Scholar
Vaghi, S., Astron. and Astrophys. 24, 107 (1973)Google Scholar
Zook, H.A., and Berg, O.E., Planet. Space Sci. 23., 183 (1975)Google Scholar