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A Systematic Change with Time in the Size of Betelgeuse

Townes, C. H. and Wishnow, E. H. and Hale, D. D. S. and Walp, B. (2009) A Systematic Change with Time in the Size of Betelgeuse. Astrophysical Journal Letters, 697 (2). L127-L128. ISSN 2041-8205.

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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%.

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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.
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Office of Naval ResearchUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:stars: general; stars: individual (Betelgeuse); techniques: interferometric
Issue or Number:2
Record Number:CaltechAUTHORS:20090701-144225715
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Official Citation:A Systematic Change with Time in the Size of Betelgeuse C. H. Townes, E. H. Wishnow, D. D. S. Hale, and B. Walp 2009 ApJ 697 L127-L128 doi: 10.1088/0004-637X/697/2/L127
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14477
Deposited By: Tony Diaz
Deposited On:29 Aug 2009 01:00
Last Modified:03 Oct 2019 00:50

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