Hunting for Dark Matter Subhalos in Strong Gravitational Lensing with Neural Networks

Understand

Dark matter substructures are interesting since they can reveal the properties of dark matter.

• Collisionless N-body simulations of cold dark matter show more substructures compared with the population of dwarf galaxy satellites observed in our local group.
• Therefore, understanding the population and property of subhalos at cosmological scale would be an interesting test for cold dark matter.
• In recent years, it has become possible to detect individual dark matter subhalos near images of strongly lensed extended background galaxies.