# EVIDENCE FOR VERY EXTENDED GASEOUS LAYERS AROUND O-RICH MIRA VARIABLES AND M GIANTS

@article{Mennesson2002EVIDENCEFV,
title={EVIDENCE FOR VERY EXTENDED GASEOUS LAYERS AROUND O-RICH MIRA VARIABLES AND M GIANTS},
author={B. Mennesson and Guy Perrin and Gilles Chagnon and Vincent Coud{\'e} du Foresto and S. T. Ridgway and A. M{\'e}rand and P. Salom{\'e} and P. Bord{\'e} and William B. Cotton and S{\'e}bastien Morel and Pierre Kervella and Wesley A. Traub and Marc G. Lacasse},
journal={The Astrophysical Journal},
year={2002},
volume={579},
pages={446-454}
}
Nine bright O-rich Mira stars and five semiregular variable cool M giants have been observed with the Infrared and Optical Telescope Array (IOTA) interferometer in both K 0 (� 2.15 lm) and L 0 (� 3.8 lm) broadband filters, in most cases at very close variability phases. All of the sample Mira stars and four of the semiregular M giants show strong increases, from ’20% to ’100%, in measured uniform-disk (UD) diameters between the K 0 and L 0 bands. (A selection of hotter M stars does not show… Expand
86 Citations
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