Dark Matter 2025: From the Smallest to the Largest Scale

Session

Tuesday Afternoon I

Jun 3, 2025, 3:00 PM

Santander, Spain

54. Galaxy Simulations and what they can tell us about Dark Matter

Rebekka Bieri (University of Zurich)

6/3/25, 3:00 PM

Invited Talk

Galaxy simulations provide a powerful framework for testing dark matter models by linking theoretical predictions to observable structures across cosmic scales. By studying the formation and evolution of galaxies in different dark matter scenarios, simulations help identify signatures that could distinguish between cold dark matter and alternative models. Low surface brightness features, such...

64. Constraining WDM Particle Mass with Dwarf Galaxies Using DREAMS Simulations

Michela Silvestrini (INAF, Osservatorio Astronomico di Capodimonte-Università di Napoli, Federico II)

6/3/25, 3:35 PM

Galaxies, Dynamics and Cosmology

Contributed Talk

The small-scale distribution of dark matter (DM) remains a key challenge in modern cosmology. While the ΛCDM paradigm successfully describes large-scale structure formation, tensions persist at galactic and sub-galactic scales, particularly in the abundance and internal structure of dwarf galaxies. Warm dark matter (WDM) has emerged as a compelling alternative to cold dark matter (CDM), as its...

29. A detailed characterization of low-mass dark matter subhalo tidal tracks via numerical simulations

Alejandra Aguirre-Santaella (Institute for Computational Cosmology, Durham University (ICC Durham))

6/3/25, 3:55 PM

Galaxies, Dynamics and Cosmology

Contributed Talk

A number of studies assert that dark matter (DM) subhaloes without a baryonic counterpart and with an inner cusp always survive no matter the strength of the tidal force they undergo.
In this work, we perform a suite of numerical simulations specifically designed to analyse the evolution of the circular velocity peaks ($V_\mathrm{max}$, and its radial value $r_\mathrm{max}$) of low-mass DM...

78. Diverse dark matter haloes in Two-field Fuzzy Dark Matter

Hoang Nhan Luu (Donostia International Physics Center)

6/3/25, 4:15 PM

Galaxies, Dynamics and Cosmology

Contributed Talk

Fuzzy dark matter (FDM) is a compelling candidate for dark matter, offering a natural explanation for the structure of diffuse low-mass haloes. However, the canonical FDM model with a mass of $10^{-22}~{\rm eV}$ encounters challenges in reproducing the observed diversity of dwarf galaxies, except for possibly scenarios where strong galactic feedback is invoked. The introduction of...