SPECTRAL VARIABILITY OF THE UNUSUAL AE HERBIG STAR V1295 AQL. I.

Abstract

On the homogenous spectral observations obtained for May-September 2015 season we have obtained some new characteristics of spectral variability of the unusual Herbiq Ae star HD190073. It is shown that with an increasing of intensity in the blue absorption component in the profiles of hydrogen lines, the variability of the star’s spectrum activated, which indicates the existence at this moment of an increasing in mass ejection from the disk. In a time interval of 98 days of observations, synchronous variability was discovered in these lines with a characteristic time of about 40 days. Monitoring of variations over time in the profiles of the emission components of the Hα and Hβ lines showed that the main variability in the lines occurs on the wings of individual components.  The half-width (250 km/s) and full width (350 km/s) at the continuum level of the hydrogen emission lines probably indicate the existence of outflow and accretion of matter from the circumstellar disk.