Abstract
The diameter of Betelgeuse (α Orionis) has been measured at a wavelength of 11.15 μm using the Infrared Spatial Interferometer over the past 15 years. During this 1993-2009 time period the star's size has decreased systematically by 15%. © 2009. The American Astronomical Society. All rights reserved.
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Townes, C. H., Wishnow, E. H., Hale, D. D. S., & Walp, B. (2009). A systematic change with time in the size of betelgeuse. Astrophysical Journal, 697(2 PART 2). https://doi.org/10.1088/0004-637X/697/2/L127
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