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Cosmological simulations of galaxy formation can produce present-day galaxieswith a large range of assembly and star formation histories. A detailed studyof the metallicity evolution and star formation history of such simulations canassist in predicting LIGO-detectable compact object binary mergers. Recentsimulations of compact binary evolution suggest the compact object merger ratedepends sensitively on the progenitor's metallicity. Rare low-metallicity starformation during galaxy assembly can produce more detected compact binariesthan typical star formation. Using detailed simulations of galaxy and chemicalevolution, we determine how sensitively the compact binary populations ofgalaxies with similar present-day appearance depend on the details of theirassembly. We also demonstrate by concrete example the extent to which dwarfgalaxies overabundantly produce compact binary mergers, particularly binaryblack holes, relative to more massive galaxies. We discuss the implications fortransient multimessenger astronomy with compact binary sources.

The effects of host galaxy properties on merging compact binaries detectable by LIGO