We are using the
NRAO's Very Long
Baseline Arrayfor an
imaging survey of compact radio sources at 15 GHz. Our primary
scientific goals are:
*
Morphology of parsec-scale structures
*
Statistics of apparent superluminal motions
*
Improved resolution over surveys at other
wavelengths
*
Test of relativistic beaming models
*
Cosmological tests
The observations are
performed in a "snapshot" observing mode (1 scan per hour of 4- 5
minute duration, over a 8 hour period). We achieve a dynamic range
of typically exceeding 1000:1, with a typical noise limit (rms) of
0.35 milli-Jansky.
MOJAVE(Monitoring of Jets in Active Galaxies with VLBA
Experiments) is the continuation of the 2cm Survey Effort, with a
redefinition of the survey sample. As a service to the scientific
community, we are making the images from the survey available
online for download on this website.
Millimetre-VLBI
The MPIfR is leading
the technically challenging observations at 3.6 mm wavelength using
very- long-baseline interferometry.
Observations of
Young Radio Supernovae with VLBI
We are observing
several radio supernovae such as SN 1993J, SN 1979C, and SN 2001gd
with very- long-baseline interferometry to monitor their light
curves, morphology, and expansion properties. These observations
are usually led by the groups at the Universitat de València
and the Instituto de Astrofísica de Andalucía, both in
Spain.
Gravitational
Lenses
We observe since 1997
quadruple gravitational lenses with the goal of determining the
morphology of the different subimages and their relative changes
with time. The ultimate goal is to determine the mass of the
lensing galaxy.
Research Topics
