Dr. Igor Tkachev (Institute for Nuclear Research of the Russian Academy of Sciences)
"Axion stars: formation, death and astrophysical implications"
Axions belong to most viable dark matter particle candidates currently. Examples are QCD axions and Fuzzy Dark Matter. I'll show that in such class of models a significant part of dark matter may consist of Bose-stars. Their condensation, even from virialized state, occurs due to universal gravitational interactions and does not require additional assumptions. After reaching critical mass an axion Bose-star becomes unstable. Subsequent collapse is peculiar, leading to Bose-nova, while black hole does not form. I also discuss various astrophysical implications of axion star existence, in particular possible relation to mysterious Fast Radio Burst phenomena.