What Millimeter VLBI Will Tell Us About Sagittarius A*

Details What Millimeter VLBI Will Tell Us About Sagittarius A* What Millimeter VLBI Will Tell Us About Sagittarius A*

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21321004f&link_type=abstract

American Astronomical Society, AAS Meeting #213, #210.04; Bulletin of the American Astronomical Society, Vol. 41, p.282

Astronomy and Astrophysics

Astronomy

Scientific paper

The recent detection of Sagittarius A* at 230 GHz using very long baseline interferometry (VLBI) demonstrates that the spatial scale of emission around the presumed massive black hole source Sgr A* is a few tens of microarcseconds, or a few Schwarzschild radii. Future millimeter VLBI observations at even higher angular resolution will be able to address basic physical questions about Sgr A*, including the spin of the black hole, the mechanism of variability, and the nature of the accretion flow. In this talk, we show how non-imaging total intensity and polarimetric observables can be used to detect source structure periodicity and constrain key physical parameters of Sgr A*, such as the black hole spin and inclination and orientation of an accretion disk.

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