PoS - Proceedings of Science
Volume 454 - 1st General Meeting and 1st Training School of the COST Action COSMIC WISPers (COSMICWISPers) - Wg2
Probing ultralight and degenerate dark matter with galactic dynamics
D. Blas
Full text: pdf
Pre-published on: February 15, 2024
Published on: April 23, 2024
This short contribution summarizes a couple of recent results to test dark matter properties with galactic dynamics. First, I will present the impact in rotation curves from solitonic structures expected at the center of galaxies for ultralight bosonic dark matter. As a result, one can claim that masses of the order
$m_{\rm DM}\lesssim 10^{-21}$eV are in tension with data. Second, I will discuss how the dark matter medium properties change the way a `probe' interacts with the halo. I will focus on dynamical friction and show how it is modified in the case of degenerate fermions. This result may be used to address the Fornax timing problem.
I hope that this contribution represents an inspiration to continue exploring other ideas in the direction of using galactic dynamics to tell apart different dark matter models.
DOI: https://doi.org/10.22323/1.454.0014
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