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Constraints from surveys of post common envelope binaries (PCEBs) consistingof a white dwarf plus an M-dwarf companion have led to significant progress inour understanding of the formation of close white dwarf binary stars withlow-mass companions. The white dwarf binary pathways project aims at extendingthese previous surveys to larger secondary masses, i.e. secondary stars ofspectral type AFGK. Here we present the discovery and observationalcharacterization of three PCEBs with G-type secondary stars and orbital periodsbetween 1.2 and 2.5 days. Using our own tools as well as MESA we estimate theevolutionary history of the binary stars and predict their future. We find alarge range of possible evolutionary histories for all three systems andidentify no indications for differences in common envelope evolution comparedto PCEBs with lower mass secondary stars. Despite their similarities in orbitalperiod and secondary spectral type, we estimate that the future of the threesystems are very different: TYC 4962-1205-1 is a progenitor of a cataclysmicvariable system with an evolved donor star, TYC 4700-815-1 will run intodynamically unstable mass transfer that will cause the two stars to merge, andTYC 1380-957-1 may appear as super soft source before becoming a rather typicalcataclysmic variable star.

The White Dwarf Binary Pathways Survey IV: Three close white dwarf binaries with G-type secondary stars