The grain-size spectrum in a protostellar cloud

Details The grain-size spectrum in a protostellar cloud The grain-size spectrum in a protostellar cloud

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986azh....63..476k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 63, May-June 1986, p. 476-482) Soviet Astronomy (ISSN 0038-5301), vol. 30, May-June 1986, p. 284

Astronomy and Astrophysics

Astronomy

Grain Size, Molecular Clouds, Particle Size Distribution, Protostars, Stellar Evolution, Stellar Models, Coagulation, Distribution Functions

Scientific paper

The coagulation equation is integrated numerically to determine how the charged dust particles in a model protostellar cloud will be distributed with respect to size at sucessive times given a definite grain-coalescence mechanism. The sintering time corresponding to an efficient surface-diffusion process is evaluated for iron particles, silicates and their oxides, and ices. It is shown that the sintering process operates more intensively for iron and iron oxide grains than for pure silicates. The present findings can be used to analyze the coagulation times for particles differing in composition either in the interstellar medium or in a protoplanetary cloud.

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