The matter-flow structure in the SS Cyg system in its quiescent state from comparisons of observational and synthetic Doppler tomograms

Details The matter-flow structure in the SS Cyg system in its quiescent state from comparisons of observational and synthetic Doppler tomograms The matter-flow structure in the SS Cyg system in its quiescent state from comparisons of observational and synthetic Doppler tomograms

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008arep...52..318b&link_type=abstract

Astronomy Reports, Volume 52, Issue 4, pp.318-326

Astronomy and Astrophysics

Astronomy

7

97.80.Gm, 97.30.Qt, 95.85.Kr, 97.10.Fy, 97.10.Gz

Scientific paper

Doppler tomograms are constructed for the quiescent state of the SS Cyg system based on H β and H γ spectral-line observations carried out in August 2006 with the 2-m telescope at Terskol Peak. Gasdynamical simulations combined with the Doppler tomograms enable identification of the main features of the flow. Comparisons of synthetic tomograms with observations indicate that an accretion disk is present in the quiescent system. In the tomograms, the luminosity is maximum at the arms of the spiral tidal shock at the shock front due to the interaction between the gas of the circum-binary envelope and material in the stream issuing from the Lagrangian point L1 (the “hot line”), and in the region behind the bow shock due to the motion of the accretor and disk in the gas of the envelope. The contribution of this last element results in appreciable asymmetry of the tomograms.

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