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Two-Component Axionic Dark Matter Halos

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arxiv 2001.10584 v1 pith:SEPTXUCG submitted 2020-01-28 hep-ph astro-ph.GAcond-mat.othergr-qc

Gennady P. Berman , Vyacheslav N. Gorshkov , Vladimir I. Tsifrinovich , Marco Merkli , Vladimir V. Tereshchuk This is my paper · ORCID
classification hep-phastro-ph.GAcond-mat.othergr-qc
keywords darkgroundmassmatterone-componentstatetemperaturetwo-component
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We consider a two-component dark matter halo (DMH) of a galaxy containing ultra-light axions (ULA) of different mass. The DMH is described as a Bose-Einstein condensate (BEC) in its ground state. In the mean-field (MF) limit we have derived the integro-differential equations for the spherically symmetrical wave functions of the two DMH components. We studied numerically the radial distribution of the mass density of ULA and constructed the parameters which could be used to distinguish between the two- and one-component DMH. We also discuss an interesting connection between the BEC MF ground state of a one-component DMH and Hawking temperature and entropy of a corresponding Black Hole, and Unruh temperature.

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