Oral Presentation

Linear Polarization of Sgr A* at ALMA Band 3, 6, 7, 8, and 9

Author(s): Hauyu Baobab Liu (ESO), Melvyn C. H. Wright (UC Berkeley), Jun-Hui Zhao (SAO CfA)

Presenter: Hauyu Baobab Liu (ESO at Garching)

I will present our measurements of the linear polarization percentages and polarization position angles of Sgr A*, based on our single-pointing observations at band 3, 6, and 7; and our mosaic (12m-Array and ACA) observations at band 8 and 9. Based on the mosaic observations I will also infer the errors in the off-axis observations. We found that the intrinsic polarization position angle of Sgr A* may be varying, or oscillating with time. On the other hand, the Faraday rotation measure has not changed significantly before and after the speculated G2 cloud encounter.