Relativistic axions from collapsing Bose stars
Event details
| Date | 04.07.2016 |
| Hour | 14:00 › 15:00 |
| Speaker | D.G. Levkov (INR RAS) |
| Location |
cubotron 727
|
| Category | Conferences - Seminars |
The smallest-scale substructures of light bosonic (axion-like) dark matter may Bose-condense into compact and gravitationally bound Bose stars. We study collapses of the critical-mass stars caused by attractive self-interaction of the axion-like particles and find that these processes proceed in an unexpected universal way. First, nonlinear self-similar evolution (wave collapse) forces the particles to fall onto the star center. Second, collisions in the dense center create an outgoing stream of mildly relativistic particles which carries away an essential part of the star mass. The collapse stops when the star remnant is no longer able to support the self-similar infall feeding the collisions. We discuss possible astrophysical and cosmological implications of these phenomena.
Practical information
- General public
- Free