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Multi-color interferometric observations of Mira stars

Show simple item record Mennesson, B. en_US Creech-Eakman, M. en_US Thompson, B. B. en_US Foresto, V. Coude du en_US Merand, A. en_US Ridgway, S. en_US Perrin, G. 2004-09-17T06:47:42Z 2004-09-17T06:47:42Z 2002-05-13 en_US
dc.identifier.citation Mass-Losing Pulsating Stars and Their Circumstellar Matter en_US
dc.identifier.citation Sendai, Japan en_US
dc.identifier.clearanceno 02-1671 en_US
dc.description.abstract Interferometric observations in the atmospheric windows of the near infrared (1 to 4 microns) can be efficiently used to probe the chemical composition of Miras atmosphere and provide direct measurements of extended gas layers around these stars. This is illustrated by recent Miras observations carried out with the FLUOR instrument of the IOTA interferometer (Mennesson et al. 2002, and Perrin et al. proceedings of this conference) and with the PTI test-bed (Thompson 2002, Thompson et al. 2002). These visibility measurements show evidence for continuum emission from very extended ( 2-3 stellar radii) semi-transparent gaseous atmospheric layers, and large apparent diameter changes with pulsation phase. Interestingly these observations are consistent with the extended molecular gas layers (H20, CO ...) already inferred around some of these objects from IS0 and high resolution ground-based FTS infrared spectra. en_US
dc.format.extent 3506885 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other Miras atmosphere infrared interferometry en_US
dc.title Multi-color interferometric observations of Mira stars en_US

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