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Compact boson star binaries are hypothetical sources for ground-based andspace gravitational-wave detectors. Their signal would be a messenger for novelfundamental fields and could shed light on the dark matter. In this work, wefurther develop our analysis in Phys. Rev. D 102, 083002 (2020), aimed atconstraining the properties of these objects with future observations. We use acoherent waveform template for the inspiral stage of boson star binaries withlarge quartic self interactions, including tidal deformability and thenonlinear dependence of the quadrupole moments on the spin in terms of thefundamental couplings of the scalar field theory. Performing a Bayesiananalysis, we investigate the ability of a third-generation gravitational-wavedetector such as the Einstein Telescope to distinguish these exotic sourcesfrom black holes and infer constraints on the fundamental couplings of themodel.

Bayesian parameter estimation on boson-star binary signals with a coherent inspiral template and spin-dependent quadrupolar corrections