The development of the new Be phase of 59 CYG in the visual and in the far UV in 1978-1983.
Bolton, C. T.; Grady, C. A.; Stalio, R.; Snow, T. P.; Lyons, R. W.; Peters, G. J.; Doazan, V.; Thomas, R. N.; Polidan, R. S.; Marlborough, J. M.; Barker, P. K.; Kuhi, L. V.; Bourdonneau, B.
France, United States, Canada
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.