Mathematics – Logic
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540417d&link_type=abstract
American Astronomical Society, AAS Meeting #215, #404.17; Bulletin of the American Astronomical Society, Vol. 42, p.227
Mathematics
Logic
Scientific paper
The Event Horizon Telescope (EHT) is a (sub)mm wavelength VLBI network that will achieve angular resolutions sufficient to resolve and image the Event Horizons of the nearest super massive black holes. SgrA*, the 4 million solar mass super massive black hole candidate at the Galactic Center, has the largest known apparent Event Horizon and is the primary target of the EHT. Previously reported VLBI observations at 1.3 mm taken in 2007 with three elements of the EHT have confirmed that SgrA* has structure on scales of just a few Schwarzschild radii. In this presentation we report on 2009 observations of Sgr A* with a similar array. We confirm the previous long-baseline detections at higher signal to noise and report on new findings. These results provide a compelling scientific case for (a) technological improvements, currently in development, to increase the sensitivity of EHT telescopes, and (b) the inclusion of additional telescopes in the EHT array in the near future in order to increase angular resolution.
Doeleman Sheperd
Event Horizon Telescope Collaboration
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