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| Paper: |
Mg-Al Oxides and the Remarkable Temperature Dependence of
their 13 μm and 32 μm Emission Bands |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
409 |
| Authors: |
Zeidler, S.; Mutschke, H.; Posch, Th. |
| Abstract: |
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. |
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