Equilibrium Temperatures of Circumstellar Oxide Dust Particles

Autor(en)

Thomas Posch, Harald Mutschke, D. Fabian

Abstrakt

On the basis of new measurements of optical constants characterizing dust particles in circumstellar dust shells, the equilibrium temperatures of different dust species in the radiation fields of an Asymptotic Giant Branch (AGB) star have been calculated. It has been found that iron-free oxides like α-Al₂O₃ and MgAl₂O₄ -- which are potential primary condensates in the atmospheres of AGB stars -- remain much cooler than iron-containing oxides due to the large difference in the visual and near-infrared opacities of both kinds of materials.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Friedrich-Schiller-Universität Jena

Journal

Hvar Observatory Bulletin

Band

26

Seiten

31 - 36

Anzahl der Seiten

6

ISSN

0351-2657

Publikationsdatum

2002

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik, 105116 Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/equilibrium-temperatures-of-circumstellar-oxide-dust-particles(d65ff943-9de0-4e43-9896-9e64ef86d071).html