Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..414..356m&link_type=abstract
Cosmic Dust - Near and Far ASP Conference Series, Vol. 414, proceedings of a conference held 8-12 September 2008 in Heidelberg,
Astronomy and Astrophysics
Astronomy
1
Scientific paper
In this paper an overview is given of the current status of the way we can obtain the optical properties of cosmic dust grains. I focus on the infrared spectral properties of irregularly shaped grains and how these spectra can be used to derive the characteristics of cosmic dust in various environments. Our current understanding of the dependence of these spectra on the grain characteristics is discussed in a qualitative manner. Methods are discussed to compute the optical properties. For this the problem is subdivided into 1) single, homogeneous grains, 2) single, inhomogeneous grains, and 3) aggregated particles. For all these particle types methods are given to compute the optical properties. Also, an overview is given of the current limitations and possibilities for improvements.
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