IUE observations of the eclipsing binaries TV CAS and YZ CAS

Astronomy and Astrophysics – Astrophysics

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Abundance, Eclipsing Binary Stars, Stellar Spectrophotometry, Ultraviolet Spectra, High Resolution, Iue, Metallicity, Spectral Resolution, Stellar Envelopes, Stellar Temperature

Scientific paper

Two high resolution IUE spectra of the primaries of the eclipsing binaries TV Cas and YZ Cas are used to derive iron group abundances. YZ Cas shows clear metallicity effects (Fe is 6 times over abundant), while TV Cas does not. The metals in YZ Cas add up to a Z value of over 0.03. The microturbulent velocities are 6.5 km s-1 (TV Cas) and 5.8 km s-1 (YZ Cas). The spectrum of TV Cas does not show indication for the existence of mass flow. The calibrated low resolution spectrum of YZ Cas indicates that its Teff is about 10,600K, E(B-V) is 0.07, and distance is 75 pc.

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