Approaching the Event Horizon through VLBI Imaging of Sagittarius A*
Figure 1: From Doeleman & Bower's article.
Major axis size, minor
axis size, and position angle of elliptical Gaussian models for
Sgr A* as a function of wavelength normalized by a lambda2
scattering law (solid line, Bower et al. 2004). The deviation in the
short wavelength sizes from the scattering law indicates the detection
of an intrinsic source size. Included is the 3.5 mm measurement in the
major axis, also made with closure amplitude techniques. (See Article by Shep Doeleman & Geoff Bower).