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- W2078478103 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 of the IRC +10216 dust shell to be much larger (150 mas) than expected from the dust-condensation temperature, implying that dust production has slowed or stopped in recent years. Apparently, dust does not form every pulsational cycle (638 days), and these mid-infrared results are consistent with recent near-infrared imaging, which indicates little or no new dust production in the last 3 yr. Spherically symmetric models failed to fit recent VY CMa data, implying that emission from the inner dust shell is highly asymmetric and/or time variable." @default.
- W2078478103 created "2016-06-24" @default.
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- W2078478103 date "2000-11-10" @default.
- W2078478103 modified "2023-10-16" @default.
- W2078478103 title "Mid‐Infrared Interferometry on Spectral Lines. II. Continuum (Dust) Emission around IRC +10216 and VY Canis Majoris" @default.
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- W2078478103 doi "https://doi.org/10.1086/317126" @default.
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