Non-stationary processes in supergiant stars of spectral class B and A
In this report we have presented the results of spectral observations of the supergiant stars HD 187982 (Sp. A1 Iab) for 2016-2021, HD 208501 (Sp. B8 Ib) for 2013-2021, and HD190603 (Sp. B1.5 Ia) for 2010-2021. Spectral observations was made at 2 m telescope of Shamakhy Astrophysical observatory by using a fibre echelle spectrograph ShAFES. In spectral range λ3700-9000Å, with spectral resolution R=28000 and R=56000.
...