SPECTRAL VARIABILITY OF THE SUPERGIANT HD 187982
Keywords:
supergiant, stars, spectral, variability, atmofpheres, stellar, wind, indivisual, HD 187982Abstract
n this report we have presented the results of spectral observations of the supergiant star HD 187982 (SpA1 Iab) for 2016-2018.Our measurements for 2017 data showed that variability for hydrogen lines higher than the other spectral lines. In this report we have presented results of studies of the time variability of the Hα line parameters.In JD 24557971.340 an ejection of
matter from the star with velocity of 7-12 km/s was observed, and after this, smooth increase in the equivalent width was found. All independently observed processes unambiguously indicate that the stellar wind near the supergiant sometimes throws out portions, i.e. outflow of the matter does not always occurred as stationary
