Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...132..187s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 132, no. 1, March 1984, p. 187-194.
Astronomy and Astrophysics
Astrophysics
97
Dwarf Novae, Light Curve, Stellar Motions, Stellar Spectrophotometry, Variable Stars, Balmer Series, Stellar Mass, Stellar Spectra, Stellar Structure
Scientific paper
Photometric and spectroscopic observations of the SU UMa star TU Men during a superoutburst in Nov. 1980 are presented and analysed. The lightcurves are dominated by superhumps with a variable period (Ps ≅ 3h, Ps < 0). The analysis of the spectra yields a periodic variability of the radial velocities with the orbital period P0 ≅ 2h50m (amplitude: K1 ≅ 150 km s-1) and a variation of γ with the period U ≅ 2d (amplitude: Kγ ≅ 280 km s-1). A primary mass M1 ≅ 0.6 M_sun;, a mass ratio of q = M1/M2 ≅ 1.7 and an orbital inclination of i ≅ 65° are estimated. By fitting the observed Balmer absorption lines to theoretical line profiles for the accretion disk, a mass transfer rate of M≅ 6×1017 g s-1 and a distance of 270 pc are obtained. An empirical relation between orbital period P0 and superhump period Ps is given.
Schoembs R.
Stolz B.
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