Conveners
Dark Matter
- Laura Baudis
Dark Matter
- Laura Baudis
Brown dwarfs (BDs) are celestial objects representing the link between the least massive main-sequence stars and giant gas planets. I will present a recent analysis (Bhattacharjee et al.,2023) where consider a sample of nine nearby ($<$ 11 pc distance), cold and old BDs and look for gamma-ray signal from the direction of these objects using 13 years of \textit{Fermi}-LAT data. In the absence...
Precision analysis of galaxy-galaxy strong gravitational lensing images provides a unique way of characterizing dark matter (DM) substructures and could allow us to uncover the fundamental properties of DM's constituents. In reality, this analysis is extremely challenging due to the high dimensionality of lensing observations and the richly-structured parameter space of lensing systems....
Upcoming neutrino experiments are expected to detect the Diffuse Supernova Neutrino Background (DSNB). This requires pondering all possible sources of background. Sub-GeV dark matter (DM) which annihilates into neutrinos is a potential background that has not been considered so far. We simulate DSNB and DM signals, as well as backgrounds in the Hyper-Kamiokande detector. We find that...
Fuzzy dark matter (FDM) modifies the internal properties of dark matter halos and large-scale cosmic environments. In this talk I will share selected insights from recent work based on cosmological $N$-body simulations. We find that the concentration of FDM-like halos peaks around two decades above the half-mode mass, breaking the approximate universality of halo density profiles observed in...
The hidden hand of dark matter (DM) shaping the Milky Way remains elusive as the dark substructure of the Galaxy is probed by tracing the dance of celestial bodies in the cosmic shadows. In our work, we exploit the increase of volume and precision in data brought about by ongoing large-scale stellar surveys and use approximately 1.6 million Red Giant Branch stars from Gaia DR3. We present a...
Electroweak multiplets, i.e. $n$-plets which are colour singlets and are charged under the $SU(2)$ gauge group of the Standard Model, are the prototype of WIMP Dark Matter (DM). The phenomenology of these candidates is significantly affected by two non-perturbative effects: Sommerfeld enhancement and bound states formation (BSF). While the former has been the focus of many studies, the latter...
