Speaker
Description
Understanding the interplay between active galactic nuclei (AGN) and star-formation activity in galaxies stems from our ability to disentangle and gauge the emission arising from both phenomena. I will present the preliminary results obtained from "AGN-sCAN", a high-resolution (0.01 arcsec) radio survey carried our with the Very Long Baseline Array (VLBA) in the COSMOS field. The combination between these VLBA and lower-resolution (arcsec) radio imaging enable us to: (i) pinpoint radio-quiet AGN misclassified as "normal" star-forming galaxies; (ii) calibrate AGN-free radio vs star formation rate conversions; (iii) identify peculiar (wandering, dual and binary) AGN candidates owing to superb angular resolution and astrometry. I will also discuss current limitations of wide-field VLBI surveys and how the next SKA(+VLBI), in tandem with multi-wavelength facilites, will bring us closer to a complete census of AGN and star-forming galaxies.
| Topics | Galaxy Evolution & AGN |
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