FEASTS: IGM cooling triggered by tidal interactions through the diffuse HI phase around NGC 4631

Jing Wang, Dong Yang, Se-Heon Oh +14

We use the single-dish radio telescope FAST to map the HI in the tidally interacting NGC 4631 group with a resolution of 3.24${}^{\prime }$ (7 kpc), reaching a 5-$\sigma$ column density limit of $…