S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
Spectral Evolution in Blazars
Christian M. Fromm
MPI für Radioastronomie, Bonn, Alemanya
Seminari del departament d'Astronomia i Astrofísica
Dimarts 03 abril 2012
The spectral evolution in Blazars is usually studied by large multi-frequency campaigns across the electro-magnetic spectrum. However, these observations cannot resolve the structure of the jets. For our study we used a different approach based on multi-frequency VLBI observations covering a frequency range form 2 GHz to 86 GHz, which allow to analyze both, the temporal and spatial spectral evolution. We developed several analysis tools to extract the spectral parameters and applied it to the 2006 radio flare in CTA 102. In the talk we will present the first results of this study.