The settling of grains in a contracting protoplanetary cloud

Details The settling of grains in a contracting protoplanetary cloud The settling of grains in a contracting protoplanetary cloud

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981azh....58...58k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 58, Jan.-Feb. 1981, p. 58-66.) Soviet Astronomy, vol. 25, Jan.-Feb. 1981, p. 33-37. Translation

Astronomy and Astrophysics

Astronomy

Gas Dynamics, Interplanetary Dust, Interstellar Matter, Particle Motion, Protoplanets, Turbulence Effects, Equations Of Motion, Grains, Gravitational Effects, Molecular Clouds

Scientific paper

It is suggested that solid particles which developed in regions of strongly turbulent gas motion and were much larger than the mean size typical of interstellar grains would have sunk to the equatorial plane of the protoplanetary cloud in a brief time period. These particles might have formed local dust condensations in the plane, whose gravitational potential (especially if the particles grew more massive as they settled down) could have exerted a substantial influence on the later subsidence of small grains. Since the sinking particles would have consisted mainly of iron or iron oxides, the composition of the dust clumps would initially have been enriched with iron. This might be significant for reconstructing the internal constitution of the planets.

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