arXiv:2305.01005·v4·Cosmology and Nongalactic Astrophysics
Self-similar growth of Bose stars
A.S. Dmitriev🇷🇺 · D.G. Levkov🇷🇺 · A.G. Panin🇷🇺 · I.I. Tkachev🇷🇺
Abstract
We analytically solve the problem of Bose star growth in the bath of gravitationally interacting particles. We find that after nucleation of this object the bath is described by a self-similar solution of kinetic equation. Together with the conservation laws, this fixes mass evolution of the Bose star. Our theory explains, in particular, the slowdown of the star growth at a certain "core-halo" mass, but also predicts formation of heavier and lighter objects in magistral dark matter models. The developed "adiabatic" approach to self-similarity may be of interest for kinetic theory in general.
Comments: 4 pages, 2 figures and 6 pages, 5 figures of the Supplemental Material; journal version