We present the first spatially resolved observations of a sample of 23 Mira stars simultaneously measured in the near-infrared J, H, and K' bands. The technique used was optical long-baseline interferometry, and we present for each star visibility amplitude measurements as a function of wavelength. We also present characteristic sizes at each spectral band, obtained by fitting the measured visibilities to a simple uniform disk model. This approach reveals the general relation J diameter < H diameter < K' diameter.
- Instrumentation: Interferometers, Stars: Atmospheres, Stars: Fundamental Parameters, Stars: Variables: Other, Techniques: High Anular Resolution
Millan-Gabet, R., Pedretti, E., Monnier, J. D., Schloerb, F. P., Traub, W. A., Carleton, N. P., Lacasse, M. G., & Segransan, D. (2005). Diameters of Mira Stars Measured Simultaneously in the J, H, and K' Near-Infrared Bands. Astrophysical Journal, 620(2), 961-969. https://doi.org/10.1086/427163