Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.3303d&link_type=abstract
American Astronomical Society, AAS Meeting #211, #33.03; Bulletin of the American Astronomical Society, Vol. 39, p.785
Astronomy and Astrophysics
Astronomy
Scientific paper
In April 2007, an array of three VLBI stations was used at 230GHz to observe bright AGN and the massive black hole candidate SgrA* in the Galactic Center. The VLBI array consisted of the Combined Array for Research in Millimeter-wave Astronomy (CARMA) in California, the James Clerk Maxwell Telescope (JCMT) on Mauna Kea, and the Submillimeter Telescope Observatory (SMTO) in Arizona. On Mauna Kea, the highly stable Local Oscillator reference signals were generated at the Submillimeter Array (SMA) using a Hydrogen Maser. This international collaborative effort succeeded in detecting extragalactic AGN targets on all array baselines. On long baselines from the Western US to Hawaii, the finest angular resolution reached was 55 micro arcseconds. In this presention, we focus on results from the observations on SgrA* and the implications on source size and constraining emission models. We also discuss future high angular resolution VLBI that will probe scales down to the Schwarzschild Radius of the assumed black hole.
Doeleman Sheperd
mm-VLBI Collaboration
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