GOODS-N AGN VLBI detect. & radio properties

Very long baseline interferometry (VLBI) can offer a solution by identifying only the most compact radio emitting regions in galaxies at cosmological distances where the high brightness temperatures (in excess of 10^5^K) can only be reliably attributed to AGN activity.The newest VLBI techniques are used to completely cover an entire 7.5' radius area to milliarcsecond resolutions, while bright radio sources (S>0.1mJy) are targeted up to 25-arcmin from the pointing centre.

Multi-source self-calibration, and a primary beam model for the EVN array are used to correct for residual phase errors and primary beam attenuation respectively. This paper presents the largest catalogue of VLBI detected sources in GOODS-N comprising of 31 compact radio sources across a redshift range of 0.11-3.44, almost three times more than previous VLBI surveys in this field.