Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-01-09
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
3 pages, 3 figures, to be published in Proceedings of Science, The 9th European VLBI Network Symposium
Scientific paper
We investigate the sample of 213 GPS sources selected from simultaneous multi-frequency 1-22 GHz observations obtained with RATAN-600 radio telescope. We use publicly available data to characterize parsec-scale structure of the selected sources. Among them we found 121 core dominated sources, 76 Compact Symmetric Object (CSO) candidates (24 of them are highly probable), 16 sources have complex parsec-scale morphology. Most of GPS galaxies are characterized by CSO-type morphology and lower observed peak frequency (~1.8 GHz). Most of GPS quasars are characterized by "core-jet"-type morphology and higher observed peak frequency (~3.6 GHz). This is in good agreement with previous results. However, we found a number of sources for which the general relation CSO - galaxy, core-jet - quasar does not hold. These sources deserve detailed investigation. Assuming simple synchrotron model of a homogeneous cloud we estimate characteristic magnetic field in parsec-scale components of GPS sources to be B ~ 10 mG.
Kovalev Yu. Yu.
Sokolovsky Kirill V.
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