Features of oxide dust particles in circumstellar shells of AGB stars

Autor(en)

Thomas Posch, Franz Kerschbaum, Harald Mutschke, Dirk Fabian, Dominik Clement, Johann M. Dorschner

Abstrakt

We give an overview of the dust emission features that oxide dust particles which are expected to form in circumstellar shells of AGB stars can produce. The dust species considered here are titanium oxides, Ca-Al-oxides, Mg-Al-oxides, Mg-Fe-oxides and amorphous alumina. At least for the presence of the latter three classes of solids, clear observational evidence exists. Some of those stars which form Mg-Al-oxide and Mg-Fe-oxide dust do not show any or do show very little amorphous silicate emission. This raises the question whether there exists a class of low-mass-loss dust shells dominated by oxides and not by silicates.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Friedrich-Schiller-Universität Jena

Seiten

141-144

Anzahl der Seiten

4

Publikationsdatum

2003

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/a5650a51-c6f7-458f-8d1f-5369d3ea21e8