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HD 172189: an eclipsing and spectroscopic binary with a<i>δ</i> Sct-type pulsating component in an open cluster
We present a study based on more than 2500 uvby-measurements collected on HD 172189, a new eclipsing binary system with a Delta Sct-type pulsating component that belongs to the open cluster IC 4756. The great interest of this object lies in that three important characteristics coexist: cluster membership, binarity and …