Proposal code 
 
v090  
 
 Proposal title 
  
Helical jet confinement & strong interaction with ISM in the CSS quasars 3C309.1 and 3C380 
 
  
 
     The   |  
     Investigators and their  |  
     Affiliations   |  
 
 
   |  P.I.   |  
    Andrzej Kus  |  
    TRAO -- Torun, Poland  |  
 
 
   |    |  
    Roy Booth  |  
    OSO -- Onsala, Sweden  |  
 
 
   |    |  
    Peter Wilkinson  |  
    NRAL -- Jodrell Bank, England  |  
 
  
 Proposal Abstract 
  
This work is a continuation of our study of two luminous CSS quasars. 
We plan to observe 3C309.1 and 3C380 at 1.6 and 5 GHz to get information on the
structure of the parsec-scale jet region to study the confinement mechanism of helical 
tubes and the interaction with exceptionally dense medium.
The second epoch spanned over one year time will give us
information on changes within the flow. The history of such interaction 
(variation of brightness, motion of shocks, structural changes, magnetic 
field changes) gives us direct information on the physical processes 
in the region and on indirect measure of central engine activity. 
Both quasars are bright, jet dominated, embeded in dense medium and 
therefore are the best examples for the proposed study.
 
 
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