CaltechAUTHORS
Published June 1, 2009 | Version Published
Journal Article Open

A Systematic Change with Time in the Size of Betelgeuse

Creators

  • 1. ROR icon University of California, Berkeley
  • 2. ROR icon California Institute of Technology

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.

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Published - Townes2009p2590Astrophys_J_Lett.pdf

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Additional details

Identifiers

Eprint ID
14477
Resolver ID
CaltechAUTHORS:20090701-144225715

Funding

NSF
Office of Naval Research
Gordon and Betty Moore Foundation

Dates

Created
2009-08-29
Created from EPrint's datestamp field
Updated
2021-11-08
Created from EPrint's last_modified field