VLBA Polarimetry: A Faraday Screen in 3C 273

Author/Creator ORCID

Date

2005

Department

Program

Citation of Original Publication

Ojha, Roopesh; Homan, Daniel C.; Wardle, John F.C.; Roberts, David H.; Aller, Hugh D.; Aller, Margo F.; Hughes, Philip A.; VLBA Polarimetry: A Faraday Screen in 3C 273; Future Directions in High Resolution Astronomy: The 10th Anniversary of the VLBA (2005); http://aspbooks.org/custom/publications/paper/340-0195.html

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Subjects

Abstract

The polarization of superluminal radio components moving at the base of the VLBI jet in 3C273 are tracked as part of a six epoch monitoring campaign at 15 and 22 GHz. The components rise sharply in fractional polarization as they move outward, suggesting either (1) an increase in intrinsic B-field order or (2) an emergence from behind a Faraday depolarizing screen. We prefer the second possibility and discuss a model that provides depolarization with little observable Faraday rotation.