Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...152..182d&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 152, no. 2, Nov. 1985, p. 182-198.
Astronomy and Astrophysics
Astrophysics
33
B Stars, H Alpha Line, Periodic Variations, Ultraviolet Spectra, Visible Spectrum, Data Reduction, Far Ultraviolet Radiation, Long Term Effects, Stellar Spectra, Tables (Data)
Scientific paper
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.
Barker Paul K.
Bolton Charles T.
Bourdonneau B.
Doazan Vera
Grady Carol A.
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