Dynamical Tracers of the Nature of Dark Matter

Contribution List

1. Is gravity the only dark matter interaction that matters in the physics of galaxies?

Jesús Zavala

2/18/25, 10:00 AM

One of the most relevant problems in Physics is to identify new particles beyond the Standard Model, which can fit the properties of the cosmological dark matter. Despite decades of searching for candidates, the nature of dark matter remains a mystery even though its role in explaining cosmic structure formation has become progressively more fundamental. Analysing the properties of the galaxy...

2. Dark matter density profiles on galactic and sub-galactic scales

Kohei Hayashi

2/18/25, 10:30 AM

The less massive galaxies, such as dwarf galaxies are ideal laboratories for exploring the fundamental nature of dark matter because they are largely dark matter-dominated systems. Their structural and dynamical properties provide unique opportunities to place constraints on dark matter distributions on small scales. However, uncovering their dark matter distributions requires detailed...

3. Gravitational dynamical probes of the nature of dark matter in galaxies

Kfir Blum

2/18/25, 11:00 AM

The hypothesis of dark matter was introduced to address observations associated with gravitational dynamics in cosmology and in galaxies. It seems natural to seek new observables that could shed light on dark matter within the same ballpark of minimal gravitational interactions, in dark matter-dominated systems. I will discuss some attempts of this type focusing on galaxies, and covering lines...

4. OPEN DISCUSSION

2/18/25, 11:30 AM

Questions for the speakers from, comments, suggestions, perspectives....

7. Tidal stripping and the fate of dark substructures of the Milky Way

Jens Stücker (Universität Wien)

2/19/25, 3:30 PM

Measurements of the presence or the absence of dark substructures of the Milky Way -- e.g. through their impact on stellar streams -- are a powerful probe of the nature of dark matter. However, the necessary theoretical predictions are tricky, since subhaloes of the Milky Way get significantly diminished through tidal stripping -- which depends on aspects that may be unresolved or unmodelled...

5. What can dwarf galaxies reveal about the nature of dark matter?

Ethan O. Nadler

2/19/25, 4:00 PM

I will review constraints on dark matter (DM) properties from dwarf galaxy luminosity function and stellar velocity dispersion measurements. These data constrain DM models that affect halo abundances (e.g. warm, fuzzy, and interacting DM) and density profiles (e.g. fuzzy, self-interacting, and primordial black hole DM). I will conclude with forecasts for upcoming dwarf galaxy surveys,...

6. Motivations for self-interacting dark matter and its viable signatures

Manoj Kaplinghat

2/19/25, 4:30 PM

This talk will summarize the motivations for self-interacting dark matter models from galactic-scale observations, current constraints from Milky Way satellites and galaxy clusters, and end with signatures of viable models in gravitational lensing images.

8. OPEN DISCUSSION

2/19/25, 5:00 PM