Renewed Radio Activity of Age 370 years in the Extragalactic Source 0108+388
Owsianik, Izabela · Conway, John E. · Polatidis, Antonis G.
Original · EN
We present the results of multi-epoch global VLBI observations of the Compact Symmetric Object (CSO) 0108+388 at 5 GHz. Analysis of data spread over 12 years shows strong evidence for an increase in the separation of the outer components at a rate of 0.197±0.026 h⁻¹c. Given an overall size of 22.2 h⁻¹pc this implies a kinematic age of only 367±48 yrs. This result strongly supports the idea that radio emission in Compact Symmetric Objects arises from recently activated radio sources. The presence of weak radio emission on kpc-scales in 0108+388 suggests recurrent activity in this source, and that we are observing it just as a new period of activity is beginning.
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