Two talks:

Jiangchuan Yu: Probing scalar gravitational atom around Sgr A* with pulsar timing

Ref. 1: Detecting ultralight dark matter in the Galactic Center with pulsars around Sgr A*

Ref. 2: Constraining Ultralight Scalar Dark Matter in the Galactic Center with the S2 Orbit

Zexin Hu: Granular mass perturbations on the pulsar - supermassive black hole system

Ref. 1: Granular mass perturbations on the pulsar - supermassive black hole system

Ref. 2: Probing an Intermediate-Mass Black Hole Companion of Sagittarius A* with Pulsar Timing