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17.12.2024 / 15:00 - 16:00 / Hamburg, SR2, building 2a
Theorie seminarA soliton-halo bound? Looking at the Ultralight Dark Matter soliton-halo relation
Luca Teodori (Weizmann Inst.)
Ultralight Dark Matter (ULDM) with particle masses around and below 1e-20 eV is a well-motivated dark matter candidate. ULDM halos differ from standard collisionless cold dark matter halos in their inner regions, corresponding to length scales comparable to the ULDM de Broglie wavelength. Notably, a cored structure, known as a soliton, can form in these halos. The presence of a soliton affects observables such as stellar kinematics in galaxies, making the determination of its characteristics highly sought after. However, there have been numerous claims regarding the existence and determination of a relation between the soliton and the overall host dark matter halo, with various groups reporting different results. One of the most investigated relations is from Schive et al. (2014), referred to as the Schive relation. In this talk, I will discuss the possibility that the Schive relation represents a lower bound of the soliton-halo relation. This hipothesis could help explain the different results reported in the literature. We test this hypothesis by performing simulations with a variety of initial conditions.
More Information: https://indico.desy.de/event/47208/
