Abstract
We present first observations of cool giant stars obtained at the ESO Very Large Telescope Interferometer (VLTI), both with two small test telescopes on a 16 m baseline, and by combining two 8m telescopes on a 100 m baseline. In particular, we devote special attention to a study of Mira (o Cet), with measurements clearly showing deviations from spherical symmetry and time variations. The VLTI will constitute an ideal instrument for such studies in the future. In particular it will permit detailed and accurate investigations of southern AGB stars, such as accurate measurements of surface structure parameters (diameters, diameter variations, asymmetries, center-to-limb variations, special features like hot spots) and of circumstellar envelopes
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© 2003 Springer Science+Business Media Dordrecht
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Richichi, A., Wittkowski, M., Schöller, M. (2003). High-Precision Measurements of Cool Giant Stars with the VLTI. In: Nakada, Y., Honma, M., Seki, M. (eds) Mass-Losing Pulsating Stars and their Circumstellar Matter. Astrophysics and Space Science Library, vol 283. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0139-7_29
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DOI: https://doi.org/10.1007/978-94-010-0139-7_29
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3968-0
Online ISBN: 978-94-010-0139-7
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