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Accretion disks play an important role in the evolution of their relativisticinner compact objects. The emergence of a new generation of interferometerswill allow to resolve these accretion disks and provide more information aboutthe properties of the central gravitating object. Due to this instrumental leapforward it is crucial to investigate the accretion disk physics near varioustypes of inner compact objects now to deduce later constraints on the centralobjects from observations. A possible candidate for the inner object is theboson star. Here, we will try to analyze the differences between accretionstructures surrounding boson stars and black holes. We aim at analysing thephysics of circular geodesics around boson stars and study simple thickaccretion tori (so-called Polish doughnuts) in the vicinity of these stars. Werealize a detailed study of the properties of circular geodesics around bosonstars. We then perform a parameter study of thick tori with constant angularmomentum surrounding boson stars. This is done using the boson star modelscomputed by a code constructed with the spectral solver library KADATH. Wedemonstrate that all the circular stable orbits are bound. In the case of aconstant angular momentum torus, a cusp in the torus surface exists only forboson stars with a strong gravitational scalar field. Moreover, for each innerradius of the disk, the allowed specific angular momentum values lie within aconstrained range which depends on the boson star considered. We show that theaccretion tori around boson stars have different characteristics than in thevicinity of a black hole. With future instruments it could be possible to usethese differences to constrain the nature of compact objects.

Circular geodesics and thick tori around rotating boson stars