Speaker
Description
Since their discovery, due to a very negative K-correction and strong constraints on the evolutionary models, galaxies detected in the sub-millimeter part of the spectrum have remained an important part of understanding galaxy evolution. Physically, they correspond to dusty star-forming galaxies. However, a number of them also host AGNs, as evidenced by a number of previous studies. In this work we estimate the prevalence of radio-excess AGNs within a SCUBA-2 detected sample of sub-millimeter sources, observed in the UDS and COSMOS fields. We perform cross-correlation of the SCUBA-2 sample with radio, 24um and 8um catalogues, using a statistical Poissonian method, in order to pinpoint the positions of the sources, as well as with optical data in order to obtain their redshifts. The radio data comes from the MIGHTEE survey, significantly improving the radio depth of our study. The AGN classification is performed by examining the ratio of radio to sub-millimeter emission, providing us with a sample of radio-excess AGNs. This result can be of value to both those trying to estimate the star-forming emission of sub-millimeter sources, where the AGNs are a contamination, and to those interested in the physics of AGNs within the sub-millimeter sample.