UNUSUAL CHANGES IN THE SPECTRUM OF AE HERBIG STAR HD 179218

Abstract

The results of homogeneous spectral observations of the Herbig Ae-type star HD179218, which were obtained in 2018 on the 2-m ShAO telescope with a spectral resolution of R=28000, are presented. The variability of the profiles and parameters of the Hα − Hγ hydrogen lines has been studied. The emission line Hα is characterized by two absorption peaks and a central absorption. The ratio of the intensities of the blue component to the red shows variability with a characteristic time of ∼100 days. We confirmed
our previous result, discovered for this star in 2015 on the smooth variation in the profile structure of the Hα line. We assume that the observed phenomenon is related to the inhomogeneity of the circumstellar disk of the star.