The angular diameter of Betelgeuse.
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