Aggregation of interstellar dust grains: effects on optical properties and dynamical behaviour

Details Aggregation of interstellar dust grains: effects on optical properties and dynamical behaviour Aggregation of interstellar dust grains: effects on optical properties and dynamical behaviour

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jphcs...6..149i&link_type=abstract

Journal of Physics: Conference Series, Volume 6, Issue 1, pp. 149-154 (2005).

Physics

1

Scientific paper

We exploit the transition matrix technique, based on the multipole expansions of the electromagnetic fields, to calculate the optical properties of interstellar dust, modelled as composite, irregularly shaped particles. We consider two diffrent mechanisms of aggregation leading to clusters with a diffrent structure and degree of fluffiness: ballistic particle-cluster aggregation and ballistic cluster-cluster aggregation. We study how the morpholgy and chemical composition of such aggregates might affect their dynamical behaviour, leading to the removal of dust from the circumstellar radiation field or to the possibility of confining it in stable regions where gravitational and radiation forces balance.

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