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Discovery of Circularly Polarized Radio Emission from SS 433
journal contribution
posted on 2023-05-16, 12:03 authored by Fender, R, Rayner, DP, Norris, R, Sault, RJ, Pooley, GWe report the discovery of circularly polarized radio emission from the radio-jet X-ray binary SS 433 with the Australia Telescope Compact Array. The flux density spectrum of the circular polarization, clearly detected at four frequencies between 1 and 9 GHz, is of the form V ∠v-0.9±0.1. Multiple components in the source and a lack of very high spatial resolution do not allow a unique determination of the origin of the circular polarization or of the spectrum of fractional polarization. However, we argue that the emission is likely to arise in the inner regions of the binary, possibly via propagation-induced conversion of linear to circular polarization, and the fractional circular polarization of these regions may be as high as 10%. Observations such as these have the potential to help us investigate the composition, whether pairs or baryonic, of the ejecta from X-ray binaries.
History
Publication title
The Astrophysical JournalVolume
530Pagination
L29-L32ISSN
0004-637XDepartment/School
School of Natural SciencesPublisher
The University of Chicago PressPlace of publication
ChicagoRepository Status
- Restricted