Structural variability of 3C 111 on parsec scales
  We discuss the parsec-scale structural variability of the extragalactic jet
3C 111 related to a major radio flux density outburst in 2007. The data
analyzed were taken within the scope of the MOJAVE, UMRAO, and F-GAMMA
programs, which monitor a large sample of the radio brightest compact
extragalactic jets with the VLBA, the University of Michigan 26 m, the
Effelsberg 100 m, and the IRAM 30 m radio telescopes. The analysis of the VLBA
data is performed by fitting Gaussian model components in the visibility
domain. We associate the ejection of bright features in the radio jet with a
major flux-density outburst in 2007. The evolution of these features suggests
the formation of a leading component and multiple trailing components.
