Long-wavelength absorption by fractal dust grains

Details Long-wavelength absorption by fractal dust grains Long-wavelength absorption by fractal dust grains

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320..818w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 15, 1987, p. 818-824.

Astronomy and Astrophysics

Astronomy

154

Absorption Cross Sections, Cosmic Dust, Interstellar Matter, Fractals, Infrared Astronomy, Random Processes, Spheres, Submillimeter Waves

Scientific paper

The far-infrared and submillimeter absorption properties of random aggregates of conducting spheres have been studied as a possible source for the long-wavelength absorption of interstellar dust grains. The complex shapes of random aggregates have various fractal dimensions, depending on the process that forms them. The absorption cross section σ versus frequency ν of these fractal grains can follow a power law σ ∝ να with 0.6 < α < 1.4 for two decades in frequency. The long wavelength absorption versus frequency is affected more by the shape of a conducting grain than by its composition.

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