Magnetic field topology of the cool, active, short-period binary system ${\sigma }^2$ Coronae Borealis

L. Rosén, O. Kochukhov, E. Alecian +4

The goal of this work is to study the cool, active binary star ${\sigma }^2$ CrB, focussing on its magnetic field. We used Stokes $IV$ data from the twin spectropolarimeters Narval at the…