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- W1562212898 abstract "We report on recent observations of AGB stars obtained with the VLT Interferometer (VLTI). We illustrate in general the potential of interferometric measurements to study stellar atmospheres and circumstellar envelopes, and demonstrate in particular the advantages of a coordinated multi-wavelength approach including near/mid-infrared as well as radio interferometry. We report on studies of the atmospheric structure of non-Mira and Mira variable giants. We have used VLTI observations of the near- and mid-infrared stellar sizes and concurrent VLBA observations of the SiO maser emission. So far, this project includes studies of the Mira stars S Ori and RR Aql as well as of the supergiant AH Sco. The results from our first epochs of S Ori measurements have recently been published and the main results are reviewed here. The S Ori maser ring is found to lie at a mean distance of approximately 2 stellar radii, a result that is virtually free of the usual uncertainty inherent in comparing observations of variable stars widely separated in time and stellar phase. We discuss the status of our more recent S Ori, RR Aql, and AH Sco observations, and present an outlook on the continuation of our project." @default.
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- W1562212898 date "2005-05-12" @default.
- W1562212898 modified "2023-09-27" @default.
- W1562212898 title "VLTI observations of AGB stars" @default.
- W1562212898 hasPublicationYear "2005" @default.
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