Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275..649w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 3, pp. 649-670.
Astronomy and Astrophysics
Astronomy
42
Binaries: Close, Stars: Fundamental Parameters, Stars: Individual: Ae Aqr, Novae, Cataclysmic Variables, Stars: Rotation
Scientific paper
We estimate the fundamental system parameters (e.g. mass ratio, inclination, stellar masses) of the unusual cataclysmic variable AE Aquarii by characterizing the behaviour of the mass-donor star. Our analysis focuses on the absorption lines from the donor star, avoiding biases induced by use of the poorly understood emission lines. Using simultaneous high-speed photometry and high-resolution Hα spectroscopy, we observed weak absorption lines in AE Aquarii's spectrum. By modelling these lines we estimate the spectral type of the mass-donor star (K3-K5), its orbital and rotation velocities (K_1~138+/-6 km s^-1, K_2=157.9+/-0.8 km s^-1 V_rot sin i=85-108 km s^-1), and its contribution to the total flux of the system (69-94 per cent). From K_2 and V_rot sin i we derive the mass ratio 0.58
Gomer Richard
Horne Keith
Welsh William F.
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