@inproceedings{6b36f998c82f4e9ab1a292312712954b,
title = "VLTI/MIDI observations of the circumstellar shell of an AGB star: W Hydrae",
abstract = "W Hydrae is a prototype AGB star with a dusty circumstellar shell. The shell is marginally resolved at ground-based subarcsecond resolution; the unresolved dust condensation radius is expected to be of order 30-50 mas. Since the dusty circumstellar shell is brightest in the mid-IR, the high spatial resolution required at midinfrared wavelengths can currently only be achieved by using MIDI on the VLTI. We therefore outline a possible observing programme for the VLTI, using MIDI at 10 pm. In a single night of short-baseline VLTI observations with two Auxiliary Telescopes, we can achieve sufficient (u,v) plane coverage to resolve the shell geometry of W Hya, which will provide strong constraints on the mass loss processes in late-type stars. We expect to either obtain an estimate of the dust condensation temperature, or evidence for interrupted mass loss.",
author = "{de Grijs}, R. and M. Marengo and G. Pietrzynski",
year = "2003",
doi = "10.1051/eas:2003023",
language = "English",
isbn = "2868836526",
series = "EAS publications series",
publisher = "EDP Sciences",
pages = "253",
editor = "G Perrin and F Malbet",
booktitle = "Observing with the VLT interferometer",
address = "France",
note = "EuroWinter School on Observing with the VLT Interferometer ; Conference date: 03-02-2002 Through 08-02-2002",
}