Authors:
Garrett, MA; Muxlow, TWB; Garrington, ST; Alef, W; Alberdi, A; van Langevelde, HJ; Venturi, T; Polatidis, AG; Kellermann, KI; Baan, WA; Kus, A; Wilkinson, PN; Richards, AMS
Abstract:
We present deep, wide-field European VLBI Network (EVN) 1.6 GHz observations of the Hubble Deep Field (HDF) region with a resolution of 0.025 arcseconds. Above the 210 mu Jy/beam (5 sigma) detection level, the EVN clearly detects two radio sources in a field that encompasses the HDF and part of the Hubble Flanking Fields (HFF). The sources detected are: VLA J123633+621133 (a z = 1.013, low-luminosity FR-I radio source located within the HDF itself) and VLA J23642+621331 (a dust enshrouded, optically faint, z = 4.424 starburst system). A third radio source, VLA J123646+621404, is detected at the 4 sigma level. The VLBI detections of all three sources suggest that most of the radio emission of these particular sources (including the dusty starburst) is generated by an embedded AGN.
Keywords:
galaxies : active; galaxies : radio continuum; galaxies : starburst