The angular diameter of Betelgeuse. (original) (raw)

ADS

;

• Blazit, A. ;
• Bonneau, D. ;
• Koechlin, L. ;
• Labeyrie, A. ;
• Foy, R.

Abstract

Measurements of the diameter of Betelgeuse from use of Labeyrie's speckle interferometer attached to the 6-m Soviet telescope and the 3.6-m ESO telescope are reported. The TiO related diameter variations evidenced are not consistent with the effective temperature of 3900 K proposed by Tsuji (1976) from model fitting to the observed energy distribution; this discrepancy is discussed. No other variation of diameter, either with wavelength or with time is meaningful within the range of errors.

Publication:

Astronomy and Astrophysics

Pub Date:

November 1982

Bibcode:

1982A&A...115..253B

Keywords:

• Astrometry;
• Stellar Atmospheres;
• Stellar Magnitude;
• Angular Resolution;
• Interferometry;
• Reference Atmospheres;
• Stellar Structure;
• Titanium Oxides;
• Astronomy