Interstellar grain size spectrum and circumstellar grain-grain collisions

Details Interstellar grain size spectrum and circumstellar grain-grain collisions Interstellar grain size spectrum and circumstellar grain-grain collisions

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..81..323d&link_type=abstract

Astrophysics and Space Science, vol. 81, no. 1-2, Jan. 1982, p. 323-328.

Computer Science

Numerical Analysis

7

Cosmic Dust, Fragmentation, Interstellar Extinction, Interstellar Matter, Particle Collisions, Stellar Envelopes, Astronomical Models, Mathematical Models, Numerical Analysis, Particle Size Distribution, Steady State

Scientific paper

An investigation is presented of the grain-grain collisions which have been hypothesized by Biermann and Harwit (1980) to occur in cool circumstellar envelopes, and to be responsible for the interstellar grain size spectrum. A fragmentation theory is presented, on the basis of which it is shown that size distributions resulting from such collisions are of a type describable by an n(a) varies as a to the -p power law. The exponent p ranges from 3.4 to 3.7 in the steady-state case, in agreement with grain size spectra derived from the interstellar extinction curve.

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