2000
DOI: 10.1086/317126
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Mid‐Infrared Interferometry on Spectral Lines. II. Continuum (Dust) Emission around IRC +10216 and VY Canis Majoris

Abstract: The University of California Berkeley Infrared Spatial Interferometer has measured the mid-infrared visibilities of the carbon star IRC ]10216 and the red supergiant VY CMa. The dust shells around these sources have been previously shown to be time variable, and these new data are used to probe the evolution of the dust shells on a decade timescale, complementing contemporaneous studies at other wavelengths. Self-consistent, spherically symmetric models at maximum and minimum light both show the inner radius o… Show more

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Cited by 39 publications
(31 citation statements)
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“…Source-averaged HCN column densities below 10 17 cm −2 would be needed to have τ(J = 3−2) <1. The diameter of the star, as derived by interferometric infrared observations and lunar occultations, is 0.038 (Monnier et al 2000;Ridgway & Keady 1988). So, high-excitation lines of HCN are coming from a compact region with a radius of 1.5 R * , i.e.…”
Section: Discussionmentioning
confidence: 97%
“…Source-averaged HCN column densities below 10 17 cm −2 would be needed to have τ(J = 3−2) <1. The diameter of the star, as derived by interferometric infrared observations and lunar occultations, is 0.038 (Monnier et al 2000;Ridgway & Keady 1988). So, high-excitation lines of HCN are coming from a compact region with a radius of 1.5 R * , i.e.…”
Section: Discussionmentioning
confidence: 97%
“…Interferometry in the mid-infrared domain was shown to be well suited to probe the atmospheres and dust shells around AGB stars since it is sensitive to the chemical composition and geometry of dust shells, their temperature, inner radii, radial distribution, and the mass-loss rate (for oxygen-rich stars, e.g., Danchi et al 1994;Monnier et al 1997Monnier et al , 2000Lopez et al 1997;Tuthill et al 2000;Tevousjan et al 2004;Ohnaka et al 2005;Weiner et al 2006;Wishnow et al 2010;Zhao-Geisler et al 2011.…”
Section: Introductionmentioning
confidence: 99%
“…Mid-infrared interferometry is sensitive to the chemical composition and geometry of dust shells, their temperature, inner radii, radial distribution, and the mass loss rate (e.g., Danchi et al 1994;Monnier et al 1997Monnier et al , 2000Weiner et al 2006). Lopez et al (1997) presented long-term observations at 11 μm of o Ceti obtained with the Infrared Spatial Interferometer (ISI).…”
Section: Introductionmentioning
confidence: 99%