On the Mass Ratio of TUMen

Astronomy and Astrophysics – Astronomy

Scientific paper

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Accretion, Accretion Disks, Instabilities, Binaries: Close, Novae, Cataclysmic Variables, Stars: Individual: Tu Men

Scientific paper

Radial velocities of TU Men measured from peaks of the emission lines are re-analyzed within the three-body approximation. The resulting crude estimate of the mass ratio is q=M_2/M_1=0.5+/-0.2. Using the mass of the secondary estimated from the M_2-P relation we obtain an independent lower limit q>0.41+/-0.08. These estimates exclude the possibility of superhumps being due to the tidal instability involving the 3:1 resonance which requires q

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