Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...170...43m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 170, no. 1, Dec. 1986, p. 43-47.
Astronomy and Astrophysics
Astrophysics
13
Astronomical Photometry, Eclipsing Binary Stars, Light Curve, Mass Ratios, Stellar Mass, Radial Velocity
Scientific paper
The recently determined spectroscopic mass ratio of V523 Cas, a typical W Ursae Majoris binary, was in strong disagreement with that obtained in its photometric solution by means of light curve synthesis methods. A search for a new photometric value evidenced serious problems of nonuniqueness and stability of the final solution; the fit of the light curve depended very weakly on the mass ratio and a new photometric solution could be chosen only through a grid search and the constraints coming from spectroscopic data. The case of V523 Cas shows that also in systems with nearly total eclipse the photometric mass ratios can be completely undefined, an umpleasant conclusion, since the bulk of W UMa mass ratios used today have a photometric source.
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