Affiliation: University of Oxford

Contribution: Oral

Title: The radio properties of high-redshift AGN and galaxies in the MIGHTEE survey

Abstract: I will discuss recent work investigating the properties of 3 < z < 5 galaxies and active galactic nuclei (AGN) using the MIGHTEE survey. MIGHTEE is a galaxy evolution survey currently underway with the MeerKAT radio telescope. Once complete, the survey will cover 20 square degrees in four fields to a depth of ~2 𝜇Jy rms/beam at 1.3 GHz, providing a unique combination of depth and breath. Crucially, the MIGHTEE fields have excellent multi-wavelength coverage, enabling a full census of galaxy properties. I use high-redshift samples selected in the optical and near-infrared from the VIDEO survey and stack the MIGHTEE continuum data at the positions of these sources. This enables me to determine: 1) the total star-formation rate of these sources from the radio data 2) the impact of AGN within these sources and 3) the evolution of these properties to the highest redshifts. This work is key to understanding the impact of dust obscuration in highly star-forming galaxies, and the transition between star-formation dominated and AGN-dominated sources at z ~ 4, which is poorly understood. Additionally, I will highlight other key recent results from the MIGHTEE survey, for example new insights into the fuelling of radio-loud AGN.

This contribution can be found here (pdf).