Modelling photoluminescence from interstellar dust

Details Modelling photoluminescence from interstellar dust Modelling photoluminescence from interstellar dust

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jphcs...6..185m&link_type=abstract

Journal of Physics: Conference Series, Volume 6, Issue 1, pp. 185-190 (2005).

Physics

Scientific paper

We recently developed a general recipe to extrapolate the expected photoluminescence (PL) of small particles from the knowledge of available laboratory results obtained on bulk samples. Starting from the semi-classical formalism of inelastic scattering by single molecules embedded in small particles, we model the emission as a distribution of uncorrelated oscillating electric dipoles, whose density is a functional of the locally absorbed energy. The PL spectrum is found to depend on the size of the dust particle and on the angle between the incoming exciting light and the direction of observation. We expect the present model to be a useful tool which will allow the study of PL phenomena of interstellar dust to move beyond the straight and possibly misleading comparison with experimental data obtained for bulk samples. We discuss the astrophysical implications of our results, their impact on current hypotheses on the carriers of the Extended Red Emission and their relevance in testing dust rotational properties.

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