Speaker
Description
The advent of the James Webb Space Telescope (JWST) has revealed a wealth of new galaxies, among which are ’little red dots’ (LRDs) at z ∼ 4 - 11, a population of previously-hidden, dust-obscured active galactic nuclei (AGNs) powered by 10^6 -10^8 M_⊙ black holes (BHs). In this talk, I will discuss results from 3D cosmological simulation which show that black holes of 10^3-10^5 solar masses can form in atomically cooling halos. They can be the potential origin of the AGNs discovered at high redshifts in the JWST JADES, CEERS and UNCOVER surveys. Furthermore, I will show the estimate of radio fluxes for LRDs and discuss the possibility of theirdetection with radio observatories such as VLA, SKA and ngVLA. The detection of a few hundred nJy radio signal at frequencies > 2 GHz will be a smoking gun for the presence of AGN in LRDs.
