Interferometric Detection and Orbit Modeling of the Subcomponent in the Hot-dust System $\hat{I}º$ Tuc A: A Low-mass Star on an Eccentric Orbit in a Hierarchical-quintuple System

T. A. Stuber, A. Mérand, F. Kirchschlager +19

The system $\hat{I}º$ Tuc A is part of a hierarchical-quintuple system and is a prime target for studies of hot-exozodiacal dust, because a time-variable near-infrared excess has been de…