We propose that stable boson stars generically fall within an infinite-parameter family of solutions that oscillate on any number of noncommensurate frequencies. We numerically construct two-frequency solutions and explore their parameter space. These solutions merge with the standard boson star family in the limit where the nondominating frequencies are turned off. We find that, for a fixed energy, these two-frequency solutions can differ considerably in size from standard boson stars.
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Choptuik et al. (2019) studied this question.
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