A Systematic Change with Time in the Size of Betelgeuse
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%.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2009
- DOI:
- 10.1088/0004-637X/697/2/L127
- Bibcode:
- 2009ApJ...697L.127T
- Keywords:
-
- stars: general;
- stars: individual: Betelgeuse;
- techniques: interferometric
