C. H. Townes et al 2009 ApJ 697 L127 doi:10.1088/0004-637X/697/2/L127
C. H. Townes1, E. H. Wishnow1, D. D. S. Hale2 and B. Walp1
Show affiliationsThe 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%.
stars: general; stars: individual (Betelgeuse); techniques: interferometric
Issue 2 (2009 June 1)
Received 2009 March 9, accepted for publication 2009 April 20
Published 2009 May 11
C. H. Townes et al 2009 ApJ 697 L127
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