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Title:
The variability of alpha Orionis
Authors:
Goldberg, L.
Affiliation:
AA(Kitt Peak National Observatory, Tucson, AZ)
Publication:
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, May 1984, p. 366-371. (PASP Homepage)
Publication Date:
05/1984
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Orion Constellation, Radial Velocity, Red Giant Stars, Stellar Envelopes, Stellar Mass Ejection, Variable Stars, Light Curve, Stellar Atmospheres, Stellar Oscillations
DOI:
10.1086/131347
Bibliographic Code:
1984PASP...96..366G

Abstract

A survey of variations in the radial-velocity and visual brightness of the star Betelgeuse (alpha-Orionis) over the last six decades is presented. On the basis of a comparison of the results of several observations, it is suggested that major disturbances in Betelgeuse's atmosphere are likely to occur in the year or two following the minimum in the six-year velocity curve. A coordinated observing program is proposed to take place during and after the next minimum, which is predicted to take place in early 1984. The desirable observations include multicolor photometry (particularly in the infrared), polarization measurements, and spectroscopy.

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