11 papers · 1 filter
Improved parameters of the hydrogen-deficient binary star KSPer
Tonu Kipper, Valentina Klochkova
Using the high resolution spectral observations obtained with the Nasmyth Echelle Spectrograph NES of the 6m telescope we analysed the optical spectrum of the hydrogen-deficient bi…
V2324Cyg - an F-type star with fast wind
V. G. Klochkova, E. L. Chentsov, V. E. Panchuk
For the first time high-resolution optical spectroscopy of the variable star V2324Cyg associated with the IR-source IRAS20572+4919 is made. More than 200 absorption features (mostl…
Kinematic structure of the atmosphere and envelope of the post-AGB star HD56126
Valentina Klochkova, Eugenij Chentsov
We present results of an analysis of the optical spectrum of the post-AGB star HD56126 (IRAS 07134+1005) based on observations made with the echelle spectrographs of the 6-m telesc…
The evolutionary status of the semiregular variable QYSge
V. G. Klochkova, V. E. Panchuk, E. L. Chentsov +1
Repeated spectroscopic observations made with the 6m telescope of yielded new data on the radial-velocity variability of the anomalous yellow supergiant QYSge. The strongest and mo…
Polaris B, an optical companion of Polaris (alpha UMi) system: atmospheric parameters, chemical composition, distance and mass
Igor Usenko, Valentina Klochkova
We present an analysis of high-resolution spectroscopic observations of Polaris B, the optical companion of the Polaris Ab system. The star has a radial velocity V_r of -16.6km/s t…
Evolutionary stage of the spectral variable BD+48 1220=IRAS 05040+4820
V. G. Klochkova, E. L. Chentsov, N. S. Tavolzhanskaya +1
Based on high-resolution observations (R=60000 and 75000), we have studied the optical spectral variability of the star BD+48 1220 (IRAS05040+4820). We have measured the equivalent…