Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 1, 2009 | Published
Journal Article Open

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%.

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

Files

Townes2009p2590Astrophys_J_Lett.pdf
Files (80.0 kB)
Name Size Download all
md5:ed5a145da3575d9eb746213bf263e627
80.0 kB Preview Download

Additional details

Created:
August 21, 2023
Modified:
October 18, 2023