On the model of dust in the Small Magellanic Cloud

Details On the model of dust in the Small Magellanic Cloud On the model of dust in the Small Magellanic Cloud

1998-12-29

arxiv.org/abs/astro-ph/9812460v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in ApJ Letters, 5 pages, 2 figures (8 Postscript files), latex2e, uses emulateapj.sty (included), mul

Scientific paper

10.1086/311903

We present here dust models for the Small Magellanic Cloud bar calculated for the first time with the regularization approach. A simple mixture of the core-mantle and/or composite grains (mostly made from silicates and organic refractory) together with silicon nanoparticles is consistent with the following: 1) the observed extinction toward AzV 398 (a typical SMC bar sightline), 2) the elemental abundances, and 3) the strength of the interstellar radiation field. We predict the expected albedo and asymmetry parameter of the models, which can be tested in future observations. The proposed dust models can also be tested by looking for the expected extended red emission.

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