HIGH VELOCITY ABSORPTION IN THE SPECTRA OF CH CYG IN 2017

Abstract

Components of extensive high velocity absorption are observed in the hydrogen lines Hβ,Hγ, Hδ and He I λ 5876 Åof the symbiotic star CH Cyg. The spectral material was obtained for 2017 with the spectral resolution R=2800, in the 2 m telescope of Shao bu using the Fibre echelle spectrograph (ShAFES) . In the blue wing the displacement of the absorbtion components have reached
up to -3000 km/s. The width of the line was riched 800-1000 km/s and the residual intencity - 0.2 - 0.6. It is supposed that the high velocity absorption is the occured due to ejection of matter from the white dwarf's equatorial part.