Multiplicity of Galactic Cepheids from long-baseline interferometry. II. The Companion of AX Circini revealed with VLTI/PIONIER

A. Gallenne, A. Mérand, P. Kervella +6

Aims: We aim at detecting and characterizing the main-sequence companion of the Cepheid AX Cir ($P_{\mathrm{orb}}\sim$ 18 yrs). The long-term objective is to estimate the mass of b…