6 papers
Young radio-loud AGN: A new sample at low redshift
I. A. G. Snellen, K. -H. Mack, W. Tschager +1
We report on the investigation of a complete sample of young radio-loud AGN at z<0.25, selected using the new comprehensive radio surveys and the optical APM/POSS-I catalog. This n…
The GHz-Peaked Spectrum radio galaxy 2021+614: Detection of slow motion in a compact symmetric object
Wolfgang Tschager, Richard T. Schilizzi, Huub J. A. R"ottgering +2
We have analysed VSOP (VLBI Space Observatory Programme) data at 5 GHz and ground-based VLBI (Very Long Baseline Interferometry) data at 15 GHz for the GHz-Peaked Spectrum (GPS) ra…
A study of young radio-loud AGN using space-VLBI
Ignas Snellen, Wolfgang Tschager, Richard Schilizzi +2
Gigahertz Peaked Spectrum (GPS) sources form a key element in the study of the onset and evolution of radio-loud AGN, since they are most likely the young counterparts of extended…
The CERES Astronomical Database
Xanthopoulos, N. J. Jackson, I. Snellen +2
The CERES Astronomical Archive was created initially in order to make the large amount of data that were collected from the two surveys, the Jodrell-VLA Astrometric Survey (JVAS) a…
Young Extragalactic Radio Sources
Ignas Snellen, Richard Schilizzi
Gigahertz Peaked Spectrum (GPS) sources and Compact Symmetric Objects (CSO) are selected in very different ways, but have a significant overlap in properties. Ever since their disc…
Deceleration of Relativistic Radio Components and the morphologies of Gigahertz Peaked Spectrum Sources
I. A. G. Snellen, R. T. Schilizzi, A. G. de Bruyn +1
A relativistic radio component, which moves in a direction close to the sky plane, will increase in flux density when it decelerates. This effect is the basis for the qualitative m…