PoS - Proceedings of Science
Volume 454 - 1st General Meeting and 1st Training School of the COST Action COSMIC WSIPers (COSMICWISPers) - Wg3
Formation of ultralight dark matter solar halos
M. Gorghetto
Full text: Not available
This short contribution summarizes some recent results on the formation of ultra-light dark matter halos around the Sun and other massive astrophysical objects. These halos, resembling gravitational atoms, are formed quite generically via the capture of light scalar dark matter, mediated by its (weak) self-interactions. The capture process is effective whenever the dark matter waves in the galactic halo are gravitationally focused by an external gravitational potential. One of our most striking results is that for a dark matter boson with mass of order $10^{-14}$ eV, a halo around the Sun can form on a timescale comparable to the lifetime of the Solar System, with a density at the position of the Earth ${O}(10^4)$ times larger than that predicted in the standard galactic halo model. If the self-interactions are attractive, the halo collapses when its density is large, and this is likely to be associated with the emission of relativistic bosons, a `Bosenova'.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.