Description
In recent years, there has been both an expansion in what we know about AGN and central black holes in dwarf galaxies, and a huge deluge of data from JWST about early black holes and galaxy evolution. Our research aims to use the new data about dwarf galaxies to constrain our models of AGN seeding, growth and feedback in GALFORM, the Durham semi-analytic model, and apply this updated model to make predictions of the early universe, and compare this with observations of black holes found in massive galaxy progenitors in the early universe. GALFORM will be run on the DM-only simulation COCO, and on some newer DM-only simulations such as the Swan-universe DM-only simulation to make predictions for the early universe. The current predictions for the GALFORM model in the dwarf regime under-estimate both the occupation fraction in bright dwarfs, and the black hole masses at a given stellar mass in dwarf galaxies. Our changes aim to bring the dwarf regime in GALFORM into agreement with the recent surveys that have found a relatively high occupation fraction in bright dwarf galaxies.
