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Spectral disentangling of the metallic-lined binary system WW Aurigae

WW Aurigae is doubled-lined eclipsing binary system. Both components show Am characteristics. Recently, Southworth et al. (2005) measured the properties of WW Aur with accuracies of 0.4% in mass and 0.6% in radius, making these among the most accurately known for any stars except the Sun. These properties are matched by theoretical evolutionary models only for a high (2.5 times solar) metal abundance. In a continuation of that study, we have reanalysed the time-series of 57 double-lined spectra (from the INT at La Palma) using spectral disentangling to obtain high-quality separated spectra of the two stars. Our goal is to further improve the determination of the effective temperatures and to study the peculiar chemical abundances of the two stars.

binary stars ; Am stars ; spectroscopy

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