Yayınlanmış 1 Ocak 2013
| Sürüm v1
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Açık
Spectral variability of IL cephei
- 1. Azerbaijan Natl Acad Sci, Shamakhy Astrophys Observ, AZ-5624 Shamakhy, Azerbaijan
Açıklama
The results of six years of spectroscopic studies of the Herbig Be star IL Cep (HD216629) are reported. Various spectral parameters of the H alpha and H beta emission lines and those of the He I lambda 5876 absorption feature are found for the first time to have exhibited slow variations in 2006-2011 and to have reached their extrema in 2009-2010. The Na I D1 and D2 lines reproduce, in a weaker form, the H alpha radialvelocity variations. It is suggested that the variations found in the spectrum of the star may be due to the presence of additional bodies in the system.
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