Coherent and incoherent dynamics of Fuzzy Dark Matter

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• Gerasimos Rigopoulos (Newcastle University)
• Monday 09 December 2024, 13:00-14:00
• CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].

If you have a question about this talk, please contact Thomas Colas.

Fuzzy Dark Matter (FDM) has been attracting increasing attention over the last decade as a popular dark matter model, alternative to Cold Dark Matter. After briefly reviewing the cosmological motivations for introducing such a model to describe dark matter, I will describe our recent work on the relation of the halos formed in FDM to the Bose-Einstein condensates at non-zero temperature studied in cold atom systems and the effects of a non-zero self-coupling on the characteristic solitons formed at the halos’ centres as well as the surrounding halo. I will then present a new general theory of a mixture of condensed and non-condensed bosonic dark matter and its implications for structure formation. Finally, I will discuss the determination of the boson’s mass and self-coupling from the rotation curves of a sample of dark mater dominated galaxies from the Sparc database. The studied galaxies imply that a non-zero, repulsive, quartic self-interaction is required.

This talk is part of the Cosmology Lunch series.

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