Constraining the local radiation field and the grain size distribution in dust SED modelling of dwarf galaxies

Abstract

I present a simple self-consistent dust spectral energy distribution (SED) model that has been applied to fit the well-sampled observed UV-to-radio SED of four nearby starbursting dwarf galaxies. The main originality of this model is that numerous multi-wavelength observations, from UV to millimeter (mm), constrain in a self-consistent manner, both the local radiation field and the grain size distribution. I finally present the results of our model and discuss the average dust properties in these dwarf galaxies.

arXiv comment8 pages; presented at "The Spectral Energy Distribution of Gas Rich Galaxies", Heidelberg (Germany), October 2004 To be published in The Spectral Energy Distribution of Gas Rich Galaxies, ed. C. Popescu & R. Tuffs (Melville: AIP), in press