Published June 1, 2009
| Published
Journal Article
Open
A Systematic Change with Time in the Size of Betelgeuse
Chicago
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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%.
Additional Information
© 2009 The American Astronomical Society. Received 2009 March 9, accepted for publication 2009 April 20 Published 2009 May 11. We thank W. Fitelson for his efforts in developing and keeping the ISI operating during these measurements. We also thank M. Bester, W. C. Danchi, and P. G. Tuthill, former staff members, the former graduate students, E. A. Lipman, J. D. Monnier, J. Wiener, and K. Tatebe, and the many undergraduate students who have helped perform and analyze these measurements. We acknowledge the use of the AAVSO database. This work received support from the National Science Foundation, the Office of Naval Research, and the Gordon and Betty Moore Foundation. Facility: ISI.Attached Files
Published - Townes2009p2590Astrophys_J_Lett.pdf
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Additional details
- Eprint ID
- 14477
- Resolver ID
- CaltechAUTHORS:20090701-144225715
- NSF
- Office of Naval Research
- Gordon and Betty Moore Foundation
- Created
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2009-08-29Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field