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The extended atmospheres of Mira variables probed by VLTI, VLBA, and APEX
Preprint
M. Wittkowski ,
D. A. Boboltz ,
C. de Breuck ,
M. Gray ,
E. Humphreys ,
M. Ireland ,
I. Karovicova ,
K. Ohnaka ,
A. E. Ruiz-Velasco ,
M. Scholz ,
P. Whitelock ,
A. Zijlstra
17 May 2011
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Abstract
We present an overview on our project to study the extended atmospheres and dust formation zones of Mira stars using coordinated observations with the Very Large Telescope Interferometer (VLTI), the Very Long Baseline Array (VLBA), and the Atacama Pathfinder Experiment (APEX). The data are interpreted using an approach of combining recent dynamic model atmospheres with a radiative transfer model of the dust shell, and combining the resulting model structure with a maser propagation model.