Coffee talks
Friday 14/01/2022 @ 11:30, On-line - meet.google.com/sue-bwvk-axf
Ivan Delvecchio (INAF-Brera), "Taming radio emission from AGN and star formation across the galaxy population"
While looking forward to the upcoming SKA, the time is ripe to start calibrating radio-synchrotron emission from star formation and Active Galactic Nuclei (AGN) across the overall galaxy population, including the currently radio-faintest objects at few micro-Jy. Some recent developments in this regard stem from deep VLA/MeerKAT surveys in the COSMOS field. In these studies we find that the radio-to-star formation rate conversion depends primarily on stellar mass (M*) and only weakly on redshift, after correcting for selection biases. Moreover, I will present a preliminary luminosity function of radio AGN emission split in M* bins and out to z~3. The integrated radio AGN power appears to follow a strong correlation with M*, at fixed redshift. I will discuss the implications of this trend regarding the occurrence of radio AGN activity across the galaxy population and its evolution. Lastly, I will show how exploiting VLBI techniques will finally allow us to overcome clear-cut AGN vs. galaxy classifications and to pinpoint the composite nature of the faint radio sky.