On the problem of search for binaries of "runaway" O-stars. The differential shifts of lines in the spectrtm of HD 188209.
Abstract
Using high dispersion spectrograms the radial velocity variability of the "runaway" star HD 188209 is analyzed in detail. H, He I, Si IV and N III absorption lines show variable differential shifts which are caused by complex infra-atmospheric motions of pulsation-type which prevent to determine the object's duplicity. The variation amplitudes of different layers are significantly different, the radial velocity amplitudes measured from He I lines being less than those measured from other lines.
- Publication:
-
Pisma v Astronomicheskii Zhurnal
- Pub Date:
- June 1988
- Bibcode:
- 1988PAZh...14..530M
- Keywords:
-
- Absorption Spectra;
- Binary Stars;
- Line Spectra;
- O Stars;
- Stellar Spectra;
- Radial Velocity;
- Spectrum Analysis;
- Astrophysics