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Paper: Discovery of the Nonstationarity of the Atmosphere and Stellar Wind of the Supergiant κ Cas
Volume: 510, Stars: From Collapse to Collapse
Page: 137
Authors: Rzaev, A. Kh.
Abstract: We investigated temporal variations of radial velocities and line profiles in the spectrum of the supergiant κ Cas based on echelle-CCD spectra obtained during 11 consecutive nights. Rapid variabilities of radial velocities and line profiles, P<1 day, were not detected. Radial velocity variability of the photospheric lines and wind lines He I λ 5876, 6678 are due to nonradial pulsations. Wind-line variabilities of Hβ and Hα are caused by superpositions of emission lines in the profiles of these lines. Variabilities of wind-line profiles, particularly, Hβ and Hα testify that κ Cas is a Be star.
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