A plum-pudding model for interstellar grains

Details A plum-pudding model for interstellar grains A plum-pudding model for interstellar grains

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..273s&link_type=abstract

Nature, vol. 262, July 22, 1976, p. 273, 274.

Astronomy and Astrophysics

Astronomy

5

Astronomical Models, Coagulation, Granular Materials, Interstellar Matter, Radiation Pressure, Condensation, Interstellar Gas, Monatomic Gases, Pressure Effects, Silicates

Scientific paper

It is demonstrated analytically that the growth of interstellar grains caused by radiation-pressure coagulation is probably of the same order as that due to the condensation of gas atoms on grain surfaces. The ratio of grain growth by condensation to that caused by coagulation is calculated, and the result indicates that grain growth is probably of the same order for both mechanisms. This result is shown to lead to the possibility of forming a 'plum-pudding' grain; i.e., a multicored grain of silicates and similar material embedded in an ice matrix. Some interesting properties of such a grain are discussed, particularly the exhibition of structure at two characteristic lengths (that of the nuclei and that of the whole assembly, including the ice).

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