Abstract
The goal of this work was to learn more about the magnetic field configuration in the parsec-scale jet of 3C273, an extremely bright and nearby quasar. In 2014, the Brandeis radio astronomy group obtained VLBA data of 3C273 in L, S, and C bands. We calibrated and imaged the data to extract polarization and rotation measure (RM) information. We implemented a model developed by Micah Margolis in his senior thesis in Mathematica to compare these results with the data. We found that the model did not produce fractional polarizations that matched our data. We proposed a change in the thermal electron distribution to help solve this issue. Since the change did not completely resolve the problem, there are many potential changes that can be made to the model in the future.