Mg-Al Oxides and the Remarkable Temperature Dependence of their 13 μm and 32 μm Emission Bands

Autor(en)

Simon Zeidler, Harald Mutschke, Thomas Posch

Abstrakt

We present the temperature-dependent (10-928 K) infrared spectra of corundum and spinel, two refractory solids which occur in the stellar outflows of oxygen-rich AGB stars. From our measurements, we were able to calculate the temperature-dependent optical constants by oscillator fits. These new data are useful to further constrain the still poorly understood features of oxide dust around AGB stars, especially the 13 μm and 32 μm emission bands. For the latter, spinel continues to be the most promising carrier.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Friedrich-Schiller-Universität Jena

Seiten

409-410

Anzahl der Seiten

2

Publikationsdatum

2015

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/mgal-oxides-and-the-remarkable-temperature-dependence-of-their-13-m-and-32m-emission-bands(5f3b525e-e5cf-44a9-9713-a7df4b845bea).html