Astronomy and Astrophysics – Astronomy
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994dib..nasa...73d&link_type=abstract
In its The Diffuse Interstellar Bands: Contributed Papers p 73-77 (SEE N95-15827 03-89)
Astronomy and Astrophysics
Astronomy
Astronomy, Dust, Growth, Heterogeneity, Impurities, Iron Oxides, Magnesium Oxides, Oxygen, Silicates, Silicon Oxides, Stellar Winds, Amorphous Materials, Formalism, Mass Flow, Mathematical Models, Red Giant Stars, Supernova Remnants
Scientific paper
Among the several proposed carriers of diffuse interstellar bands (DIB's) are impurities in small dust grains, especially in iron oxide grains (Huffman 1977) and silicate grains (Huffman 1970). Most promising are single ion impurities since they can reproduce the observed band widths (Whittet 1992). These oxygen-rich grains are believed to originate mostly in the mass flows from red giants and in supernovae ejecta (e.g. Gehrz 1989). A question of considerable impact for the origin of DIB's is therefore, whether these grains are produced as mainly clean crystals or as some dirty materials. A formalism has been developed that allows tracking of the heterogeneous growth of a dust grain and its internal structure during the dust formation process. This formalism has been applied to the dust formation in the outflow from a red giant star.
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