23–28 Feb 2025
IBS
Asia/Seoul timezone

Machine Learning for Galactic Dynamics: Mapping Dark Matter in the Local Universe

27 Feb 2025, 09:30
1h
IBS

IBS

Speaker

Sung Hak Lim (IBS CTPU-PTC)

Description

Recent advances in machine learning (ML), particularly neural density estimation like normalizing flows, diffusion models, and flow matching, have opened new doors for high-precision, model-independent density estimation. These techniques are highly valuable for galactic dynamics studies, as they allow us to estimate the distribution of stars in phase space (position and velocity) without relying on traditional simplified models. By combining these ML-based stellar density estimates and equations of motion solvers for inferring gravitational fields, we can measure the local dark matter density in a model-independent way. This talk presents new research opportunities in this direction, focusing on modeling objects in our local universe using neural networks and using them for understanding local galactic dark matter distribution. We anticipate that these modern machine learning-based approaches will allow us to fully utilize the potential of current and future astronomical catalogs, significantly improving our understanding of dark matter in the local universe.

Presentation materials