Other
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..637...77e&link_type=abstract
CLASSICAL NOVA EXPLOSIONS: International Conference on Classical Nova Explosions. AIP Conference Proceedings, Volume 637, pp. 7
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1
Novae, Dwarf Novae, Recurrent Novae, And Other Cataclysmic Variables, Accretion And Accretion Disks, Spectroscopy And Spectrophotometry
Scientific paper
We have observed WZ Sge with high resolution echelle spectroscopy during the 2001 superoutburst. The hot-spot arising near the secondary star is again visible 15 days after its first detection. We have been able to measure its position as a function of orbital phase directly from individual spectra. We derive a a semiamplitude of Khs = 457 +/- 16km s-1 and a systemic velocity of γ = 0 +/- 14km s-1. We also show that the accretion disc has an ellipsoidal shape with a value around e = 0.75. Based on these facts we derive a phase shift of ΔΦ = -0.12 between the eclipse and the inferior conjuntion ephemeris. If this is the case, then the hot-spot appears located at the trailing side of the red dwarf and must be the result of in-falling material back to the donor star.
Arellano-Ferro Armando
Costero Rafael
Echevarria J. J.
Michel Raul
Richer Michael
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