Abstract
Interferometric observations of the nearby eclipsing binary δ Vel A were obtained with VLTI/VINCI and AMBER. The measurements, which for the first time resolve the two components, are analysed with non-linear least-square fitting methods and provide estimates of the orbital parameters and the stellar properties. We derive a system mass of MAa+Ab=(4.05±0.30)M⊙ and an eccentric binary orbit (e≈0.26). The observations further indicate that the components’ diameters are much larger than expected for main-sequence stars, implying that Aa and Ab are in evolved post main-sequence evolutionary phases
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Kellerer, A., Petr-Gotzens, M., Kervella, P., Coud’e du Foresto, V. (2008). New Facts about δ Velorum: Fewer but Larger Components. In: Hubrig, S., Petr-Gotzens, M., Tokovinin, A. (eds) Multiple Stars Across the H-R Diagram. ESO Astrophysics Symposia. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74745-1_17
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DOI: https://doi.org/10.1007/978-3-540-74745-1_17
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