# VLBA+GBT observations of the COSMOS field and radio source counts at 1.4 GHz

27 Apr 2018 Ruiz N. Herrera Middelberg E. Deller A. Smolčić V. Norris R. P. Novak M. Delvecchio I. Best P. N. Schinnerer E. Momjian E. Dettmar R. -J. Brisken W. Koekemoer A. M. Scoville N. Z.

We present very long baseline interferometry (VLBI) observations of 179 radio sources in the COSMOS field with extremely high sensitivity using the Green Bank Telescope (GBT) together with the Very Long Baseline Array (VLBA) (VLBA+GBT) at 1.4 GHz, to explore the faint radio population in the flux density regime of tens of $\mu$Jy. Here, the identification of active galactic nuclei (AGN) is based on the VLBI detection of the source, i.e., it is independent of X-ray or infrared properties... (read more)

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• ASTROPHYSICS OF GALAXIES