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ACES V Hydrae: a dusty AGB binary with a jet - Lea Planquart (Universite Libre de Bruxelles,Belgium)

V Hydrae (V Hya) is a well-studied AGB star known to exhibit a complex environment, hinting at its transition from the AGB to the pre-planetary nebula phase. Thanks to a multi-instrumental study - combining optical spectroscopic monitoring with mid-infrared interferometry - we prove the existence of a close-by companion around the AGB star. The visual obscuration events occurring every 17 years, and correlated with the orbital motion, are found to be caused by the presence of a dust clump moving along with the companion. Based on spatio-kinematic modeling of a conical jet attached to the companion, we provide constraints on the gas and dust distribution in the system. By connecting the orbit-scale properties of the binary with previous large-scale observations, the V Hydrae system gives further evidence that close-by companions are an essential ingredient to shape bipolar pre-planetary nebulae.