The development of the new Be phase of 59 CYG in the visual and in the far UV in 1978-1983.
Abstract
A tentative synthesis of visual and IUE observations of 59 Cyg during 1978-1983 when the new Be phase began to develop is presented. The study reveals correlation between those spectral features originating in the cool H-alpha-emitting envelope and features originating in superionized regions exhibiting C IV and N V lines. The long-term variability patterns of the V/R ratio, the H-alpha emission, and the C IV absorption reveal striking similarities and a close correlation. The early development of the new Be phase is accompanied by remarkably large and striking C IV line-profile changes. It is also suggested that short-term V/R variations at H-alpha may be associated with short-term C IV changes.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1985
- Bibcode:
- 1985A&A...152..182D
- Keywords:
-
- B Stars;
- H Alpha Line;
- Periodic Variations;
- Ultraviolet Spectra;
- Visible Spectrum;
- Data Reduction;
- Far Ultraviolet Radiation;
- Long Term Effects;
- Stellar Spectra;
- Tables (Data);
- Astrophysics