The orbital period -- mass ratio relation of wide sdB+MS binaries and its application to the stability of RLOF

Joris Vos, Maja Vucković, Xuefei Chen +5

Wide binaries with hot subdwarf-B (sdB) primaries and main sequence companions are thought to form only through stable Roche lobe overflow (RLOF) of the sdB progenitor near the tip…