Constraints on Einstein-dilation-Gauss-Bonnet gravity and the electric charge of compact binary systems from GW230529

In this work, we study the implications of GW230529 on gravity theories and the charge of black holes. The GW230529, which was initially released in O4a, is most likely neutron-star-black-hole mergers. We reanalyze the data from the GW230529 event to obtain bounds on the Einstein-dilation-Gauss-Bonnet (EdGB) gravity parameter √αEdGB and the electric charge of compact binary systems. The event places a 90% credible upper bounds on √αEdGB of 0.298 km. After including high order corrections of EdGB gravity, the bounds improve to √αEdGB0.260 km. Analyses of GW230529 also yield a 90% credible upper bounds on the combination of charge-to-mass ratio of the binary components ζ0.024. The constraints are more stringent than those derived from previously observed single gravitational wave merger event.