Speaker
Description
We present MeerKAT HI observations of galaxies in the core of the Shapley Supercluster, one of the most massive structures in the local Universe. Our sample of HI-detected galaxies in A3558 and SC1329 allows us to examine how cold-gas content and star formation evolve in an extreme, high-density environment. Galaxies in the SSC-core lie systematically below field HI scaling relations, showing depleted gas fractions and extended depletion timescales. Despite retaining substantial HI reservoirs, many systems exhibit inefficient or suppressed star formation, indicating slow quenching driven by reduced gas accretion, tidal interactions, and weak or partial ram-pressure stripping. Disturbed HI morphologies support ongoing environmental processes. These results point to a gradual, multi-stage transformation of galaxies as they move through the densest nodes of the supercluster, extending environmental quenching studies into the supercluster regime.
| Apply for student award at which level: | PhD |
|---|---|
| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |