Proposal code
w031
Proposal title
A deLaval Nozzle in the Gamma-Ray Blazar NRAO 530?
The |
Investigators and their |
Affiliations |
| P.I. |
Geoffrey C. Bower |
MPIfR - Bonn, Germany |
| |
Donald C. Backer |
UC Berkeley, USA |
Proposal Abstract
We propose a single observation at 1.6 and 5 GHz of the gamma-ray blazar
NRAO 530. We expect to detect proper motion of features in the
jet identified with our earlier VSOP observations.
Further, we predict that we will identify a new component
created during a dramatic millimeter flare in early 1995. This is
an excellent opportunity to follow a very bright
flare from the sub- to super-mas
scales over a wide frequency range.
Our continuing studies with 22, 43 and 86 GHz VLBI show that this component
went through complicated non-linear evolution on scales of less than
0.5 mas (=2 pc). The best interpretation of this phenomena is the existence
of a deLaval nozzle at a radius of 0.25 mas. Detecting and tracking
this component on larger scales will significantly improve our
understanding of the relationship between the pre- and post-nozzle
physical properties and the formation of large-scale jet features.
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