The Youngest Lobe-Dominated Radio Sources

Details The Youngest Lobe-Dominated Radio Sources The Youngest Lobe-Dominated Radio Sources

1999-07-09

arxiv.org/abs/astro-ph/9907120v1

New Astron.Rev. 43 (1999) 669-673

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, the preprint from the 4th EVN/JIVE Symposium, submited and accepted by the refereed journal New Astromomy

Scientific paper

10.1016/S1387-6473(99)00075-5

We present an analysis of multi-epoch global VLBI observations of the Compact Symmetric Objects: 2352+495 and 0710+439 at 5 GHz. Analysis of data spread over almost two decades shows strong evidence for an increase in separation of the outer components of both sources at a rate of ~0.2 h^{-1} c (for q_{0}=0.5 and H_{0}=100 h kms^{-1} Mpc^{-1}). Dividing the overall sizes of the sources by their separation rates implies that these Compact Symmetric Objects have a kinematic age < 10^{4} years. These results (and those for other CSOs) strongly argue that CSOs are indeed very young sources and that they are probably evolve into the much larger classical doubles.

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