Study of FU Oionis stars. II. Hα-line in the spectrum of V1057 Cygni.
Abstract
Measurements of the Hα-absorption line radial velocity in the spectrum of the fuor V1057 Cyg carried out using 1974 - 1982 spectrograms are presented adding the analogous data for 1971 - 1975 published by Herbig (1977). The following conclusions are made: a) the 1969 - 1970 optical flare of the star was accompanied by high-velocity ejections of matter, b) a nonstationary continuous outflow of matter takes place at the stage of brightness decrease.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- October 1983
- Bibcode:
- 1983PAZh....9..622K
- Keywords:
-
- H Alpha Line;
- Stellar Spectra;
- Variable Stars;
- Astronomical Spectroscopy;
- Cygnus Constellation;
- Orion Constellation;
- Stellar Flares;
- Stellar Mass Ejection;
- T Tauri Stars;
- Visible Spectrum;
- Astrophysics