The Imprint of Dynamical Friction in Globular Cluster-Rich Galaxies as a Probe of Dark Matter

Feb 14, 2023 - 10:40 am to 11:30 am

Campus, PAB 102/103

Shany Danieli (Princeton) In Person and zoom

Zoom info:

Gravitational dynamical friction impacting the orbits of globular clusters was studied extensively as a viable formation mechanism for nuclear star clusters in galaxies. Recent extragalactic observations revealed an intriguing population of extremely globular cluster-rich dwarf and ultra-diffuse galaxies which offer new prospects for testing galactic dynamics theory. I’ll present our work which provides evidence for the imprint of dynamical friction in these galaxies, visible via mass segregation of the clusters. I will discuss a new framework for obtaining constraints on the distribution of dark matter in these globular cluster-rich low-mass galaxies, utilizing the photometry and positions of their globular cluster populations and dynamical considerations. Combining these dynamical constraints with constraints from star and cluster kinematics, this approach holds the potential to offer a novel perspective on the nature of dark matter.