Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon

Author： Polster J.   Korčáková D.   Manset N.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|617|issue|A79-A79

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.617, Iss.issue, 2018-09, pp. : A79-A79

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Abstract

We present an alternative model of V2028 Cyg, a B[e] star of FS CMa type. The star V2028 Cyg is atypical among FS CMa stars due to its composite spectra of B4III and K2II-Ib type. Our modelling of the temporal variability of the Hα line bisectors indicates as the most probable model a geometrically and optically thick disc, which is surrounded by a dusty ring seen almost edge-on. This provides a possibility that the K-spectral component is formed in the disc.

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