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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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