A new HW Vir binary from the Palomar Transient Factory: PTF1 J072455.75+125300.3 - An eclipsing subdwarf B binary with a M-star companion

M. Schindewolf, D. Levitan, U. Heber +4

We report the discovery of an eclipsing binary -- PTF1 J072456$+$125301-- composed of a subdwarf B (sdB) star ($g^{\prime }=17.2^m$) with a faint companion. Subdwarf B stars are core helium…