Cambridge University Press (CUP), Proceedings of the International Astronomical Union, S284(7), p. 231-233, 2011
DOI: 10.1017/s174392131200912x
Astronomy & Astrophysics, (536), p. A35, 2011
DOI: 10.1051/0004-6361/201117834
Full text: Unavailable
AbstractWe have discovered eight relatively strong radio sources that have no optical counterparts. A NIR follow-up has detected faint (17–20 mag) host galaxies in all targets. In general, the radio properties are similar to those observed in 3CRR sources but the optical-radio slopes are consistent with moderate to high redshift (z < 4) GHz-peaked spectrum sources. Our results suggest that these are galaxies whose black hole has been recently re-ignited into activity but that retain large-scale radio structures, signatures of previous AGN activity.