CIRCUMSTELLAR SPECTRAL VARIATIONS OF THE STAR HD 190073
Keywords:
pre-main sequence stars, spectral variations, circumstellar matter, emission lines, Ae stars, individual V1295 AqlAbstract
We have presented the results of spectral observations of the Herbig Ae star V1295 Aql, carried out in 2015-2017 at the 2 m telescope of the ShAO of ANAS. In 2015, a change in the radial velocities and equivalent widths of the emission component of the Ha and Hb lines was detected with a characteristic time of about 40 days. The main variations in the profiles are observed on
the wings of the hydrogen lines. In different years, there is a change in the activity of the star. We assume that the discovered phenomenon indicates the existence of a stable formation in the circumstellar space of the star HD 190073. A possible heterogeneity in the circumstellar disk may be the result of the existence of an asymmetric structure caused by the destroyed disk in a result of planet formation processes.
