The linear polarization of Sagittarius A*. II. VLA and BIMA polarimetry at 22, 43, and 86 GHz

We present a search for linear polarization at 22, 43, and 86 GHz from the nearest supermassive black hole candidate, Sagittarius A*. We find upper limits to the linear polarization of 0.2%, 0.4%, and 1%, respectively. These results strongly support the conclusion of our centimeter wavelength spectropolarimetry that Sgr A* is not depolarized by the interstellar medium but is in fact intrinsically depolarized.