Multi-Frequency VLBI Observations of GHz-Peaked Spectrum Sources

Details Multi-Frequency VLBI Observations of GHz-Peaked Spectrum Sources Multi-Frequency VLBI Observations of GHz-Peaked Spectrum Sources

2004-12-30

arxiv.org/abs/astro-ph/0412674v1

Astronomy and Astrophysics

Astrophysics

2 pages. 3 figures. Proceedings of the 7th European VLBI Network Symposium held in Toledo, Spain on October 12-15, 2004. Edito

Scientific paper

We report results of pentachromatic VLBI survey for 18 GHz-peaked spectrum sources. Spectral fitting at every pixel across five frequencies allows us to illustrate distribution of optical depth in terms of free-free absorption or synchrotron self absorption. Quasars and Seyfert 1 sources show one-sided morphology with a core at the end where the optical depth peaks. Radio galaxies and Seyfert 2 show symmetric double-sided jets with a optically thick core at the center.

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