Behavior of emission lines in the spectrum of the polar CW 1103 + 254

Details Behavior of emission lines in the spectrum of the polar CW 1103 + 254 Behavior of emission lines in the spectrum of the polar CW 1103 + 254

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pazh...13..495v&link_type=abstract

Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 13, June 1987, p. 495-501. In Russian. In Russian. In Russian.

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Binary Stars, Cataclysmic Variables, Emission Spectra, Line Spectra, Stellar Spectra, White Dwarf Stars, Helium Ions, Hydrogen, Radial Velocity, Spectral Line Width, Stellar Spectrophotometry

Scientific paper

The results of emission spectrum observations of the polar CW 1103+254 are given. Variations have been detected in the radial velocity curves and equivalent widths of hydrogen and He II λ4686 lines in comparison with earlier observations by other authors. A systematic shift of the radial velocity curves, measured from the broad line component has been discovered. This indicates that there is some other periodic motion with the characteristic period ≡8 - 9 years in the system. The authors suggest the following causes of the motion: (1) precession of a magnetic white dwarf, (2) apsidal motion, (3) asynchronism of proper and orbital rotations of the magnetic white dwarf.

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