Binary star population of the Sculptor dwarf galaxy

Understand

Aims: We aim to compute the binary fraction of "classical" dwarf spheroidal galaxies (dSphs) that are satellites of the Milky Way (MW).

• This value can offer insights into the binary fraction in environments that are less dense and more metal-poor than our own galaxy.
• Additionally, knowledge of the binary fraction in dwarf galaxies is important with respect to avoiding overestimations of their dark matter content, inferred from stellar kinematics.
• Methods: We refined an existing method from the literature, placing an emphasis on providing robust uncertainties on the value of the binary fraction.