The variability of alpha Orionis

Details The variability of alpha Orionis The variability of alpha Orionis

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..366g&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, May 1984, p. 366-371.

Astronomy and Astrophysics

Astronomy

38

Orion Constellation, Radial Velocity, Red Giant Stars, Stellar Envelopes, Stellar Mass Ejection, Variable Stars, Light Curve, Stellar Atmospheres, Stellar Oscillations

Scientific paper

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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