Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.209..149w&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 209, no. 1, p. 149-156
Astronomy and Astrophysics
Astrophysics
Absorption Cross Sections, Aggregates, Astronomical Models, Computerized Simulation, Dust, Particulates, Scattering Cross Sections, Electromagnetic Absorption, Electromagnetic Scattering, Magnetite, Mathematical Models, Silicates
Scientific paper
We show that suitably defined Guettler (core-mantle) analogs can satisfactorily represent the optical cross-sections of aggregates of very small particles that result from mutual collisions and stickling. Earlier calculations using the discrete dipole approximation are seen to be in good agreement with Guettler analog calculations, particularly in the case of the so-called Ballistic Particle-Cluster Aggregates (BPCA).
Kozasa Takashi
Wickramasinghe Chandra N.
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