An investigation of the micro variations of highly luminous OBA-type stars (alpha Cygni variables). VIII. A study of the periodicities in the radial velocity and light variations of the nitrogen-rich supergiant HD 105056 (ON 9.7 Iae).
Abstract
High-precision VBLUW photometry of HD105056 (ON9.7Iae) are presented, providing a photometric period (1.73600 + or - 0.00025 d) which is less than that found previously. The intrinsic scatter around the orbital light curve, caused by the microvariations, is found to have a characteristic time scale of 3.5420 + or 0.0005 d. The total range of the microvariations is shown to be significantly larger than that for other stars of the same temperature.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 1989
- Bibcode:
- 1989A&A...213..161V
- Keywords:
-
- Binary Stars;
- Early Stars;
- Light Curve;
- Stellar Spectrophotometry;
- Supergiant Stars;
- Variable Stars;
- Abundance;
- Nitrogen;
- Phase Diagrams;
- Radial Velocity;
- Astrophysics