title: Detection of Polarized Millimeter and Submillimeter Emission from Sagittarius A*
abstract: We report the detection of linear polarization from Sgr A* at 750, 850, 1350, and 2000 µm which confirms the contribution of synchrotron radiation. From the lack of polarization at longer wavelengths, it appears to arise in the millimeter/submillimeter excess. There are large position angle changes between the millimeter and submillimeter results, and these are discussed in terms of a polarized dust contribution in the submillimeter and various synchrotron models. In the model that best explains the data, the synchrotron radiation from the excess is self-absorbed in the millimeter region and becomes optically thin in the submillimeter. This implies that the excess arises in an extremely compact source of approximately 2 Schwarzschild radii.
authors.initials: DK
authors.lastname: Aitken
authors.initials: J
authors.lastname: Greaves
authors.initials: A
authors.lastname: Chrysostomou
authors.initials: T
authors.lastname: Jenness
authors.initials: W
authors.lastname: Holland
authors.initials: JH
authors.lastname: Hough
authors.initials: D
authors.lastname: Pierce-Price
authors.initials: J
authors.lastname: Richer