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2000MNRAS.313..533S - Mon. Not. R. Astron. Soc., 313, 533-546 (2000/April-2)
Multi-epoch Doppler tomography and polarimetry of QQ Vul.
SCHWOPE A.D., CATALAN M.S., BEUERMANN K., METZNER A., SMITH R.C. and STEEGHS D.
Abstract (from CDS):
Doppler images of blue emission and red absorption lines show a clear separation between the illuminated and non-illuminated hemispheres of the secondary star. The absorption lines on their own can be used to determine the mass ratio of the binary by Doppler tomography with an accuracy of 15-20 per cent. The narrow emission lines of different atomic species show remarkably different radial velocity amplitudes: K=85-130km.s–1. Emission lines from the most highly ionized species, Heii, originate closest to the inner Lagrangian point L1. We can discern two kinematic components within the accretion stream; one is associated with the ballistic part, and the other with the magnetically threaded part of the stream. The location of the emission component associated with the ballistic accretion stream appears displaced between different epochs. Whether this displacement indicates a dislocation of the ballistic stream, e.g. by a magnetic drag, or emission from the magnetically threaded part of the stream with near-ballistic velocities, remains unsolved.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): accretion, accretion discs - line: profiles - polarization - stars: individual: QQ Vul - novae, cataclysmic variables
Simbad objects: 4
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