The massive, nearly face-on cataclysmic variable GD 552

Details The massive, nearly face-on cataclysmic variable GD 552 The massive, nearly face-on cataclysmic variable GD 552

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228..387h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 2, Feb. 1990, p. 387-398.

Astronomy and Astrophysics

Astrophysics

33

Cataclysmic Variables, Eclipsing Binary Stars, Stellar Orbits, Stellar Spectra, White Dwarf Stars, Astronomical Spectroscopy, Balmer Series, H Beta Line, Spectral Energy Distribution, Stellar Mass Accretion

Scientific paper

A complete set of estimates for the orbital and disk parameters of the cataclysmic variable system GD 552 is presented. The orbital period of 0.07134 +/- 0.00011 days is determined, as well as the orbital radial velocity of 16 +/- 4 km/s obtained from the emission-line wings. The mass ratio, outer-disk radius, and true K1 velocity are derived, and it is suggested that the observed emission comes from the accretion stream rather than from material with the velocity of the outer disk. It is noted that the primary has a mass near the Chandrasekhar limit if the radius of the secondary is within 15 percent of that predicted from an empirical zero-age main sequence mass-radius relation. The large primary mass should make this system unstable to dwarf nova and even recurrent nova eruptions.

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