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Ultralight scalar dark matter has been proposed to constitute a component ofdark matter, though the minimal scenarios have increasingly become constrained.In this work, we analyze scenarios where the dark matter consists of more thanone ultralight boson, each with different masses. This potentially leads toformation of gravitationally-bound Bose-Einstein condensates with structuresthat are very different from condensates composed of a single scalar field. Bygeneralizing from the well-understood single-flavor case, we explore a largerange of input parameters, subject to stability criteria, and determine theallowed parameter space for two-flavor condensates as a function of particlephysics parameters, paying particular attention to cases where such condensatescould compose galactic cores. We also analyze single-flavor condensates subjectto external gravity from massive inner bodies and find that such systems maymimic the size of galactic cores as well.

Galactic Condensates composed of Multiple Axion Species