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| Paper: |
High Dynamics Infrared Imaging of Evolved Stars with FLUOR/IOTA |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
2021 |
| Authors: |
Perrin, G.; Coude Du Foresto, V.; Ridgway, S. T.; Mariotti, J.-M.; Traub, W. A.; Carleton, N. P.; Lacasse, M. G. |
| Abstract: |
The high precision FLUOR beam combiner set on the IOTA interferometer allows a very accurate calibration of visibilities. As a consequence, it is very well suited to study surface structures and variations of evolved stars in the K band. We present data obtained on several stars showing departure from uniform and limb-darkened disk models and variations with time. Among them, surface features on the supergiant alpha Orionis and diameter variations of the Mira type star R Leonis. |
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