Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984afz....20..465m&link_type=abstract
(Astrofizika, vol. 20, May-June 1984, p. 465-473) Astrophysics (ISSN 0571-7132), vol. 20, no. 3, Nov. 1984, p. 250-255. Translat
Astronomy and Astrophysics
Astrophysics
19
Balmer Series, Stellar Spectra, Variable Stars, Fine Structure, Radial Velocity, Spectrum Analysis
Scientific paper
The variations in the radial velocities of the fine-structure components of the spectrum of P Cyg are considered on the basis of 32 spectra obtained between March and November 1981. The quality of the observational material and the measurement of radial velocities are described. Possible systematic errors in the measurements due to blending by other lines are analyzed, and it is shown that the variability of the hydrogen lines in the fine structure of the absorption components can be described in two ways: by displacement of the fine-structure components one after another from the center of the line to its violet wing, or by a periodic variation of the radial velocity of four components that are antiphased in pairs. Possible directions of research for discriminating between these two descriptions are considered.
Kolka Indrek
Markova Natalia
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