Spectroscopy of the cataclysmic variable UU AQR

Details Spectroscopy of the cataclysmic variable UU AQR Spectroscopy of the cataclysmic variable UU AQR

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1417d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Oct. 1991, p. 1417-1422.

Astronomy and Astrophysics

Astronomy

16

Astronomical Spectroscopy, Cataclysmic Variables, White Dwarf Stars, Accretion Disks, H Alpha Line

Scientific paper

Time-resolved spectroscopic observations of the eclipsing cataclysmic variable UU Aqr are presented. The high-resolution data show that H-alpha has a strong, phase-dependent, asymmetric profile. The radial velocity curve, derived from the broad line wings, shows a semiamplitude of 120 km/s. Amplitude and phase for the 'S-wave' are also derived. A mass ratio of 0.4 and a mass of 0.9 atomic mass for the white dwarf are obtained. The emission line behavior suggests that most of the H-alpha emission comes from an optically thin hot spot, while the accretion disk must be optically thick.

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