A field-theoretic model for a highly compact object that mimicks a black holeis found for the gravitationally interacting system of a boson star and aglobal monopole which are nonminimally coupled to gravity. According to thestrength of the nonlinear gravitational effects and the gravitationalbackreaction, three distinct coupling regimes are featured: weak, mild andstrong. In the strong coupling regime we show that a repulsive monopolestabilizes an attractive boson star and the resulting configuration exhibitslarge energy density, large (and negative) principal pressures, largecompactness, large effective potential, large local forces, and yet exhibits noevent horizon. As such a composite system of a boson star and a global monopolerepresents a convincing microscopic candidate for a black hole mimicker.
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