Kaczmarek, Jane FPurcell, C RGaensler, B MMcClure-Griffiths, NaomiStevens, Jamie2021-06-042021-06-040035-8711http://hdl.handle.net/1885/236770We present an investigation into the magnetism of the Magellanic Bridge, carried out through the observation of Faraday rotation towards 167 polarized extragalactic radio sources spanning the continuous frequency range of 1.3–3.1 GHz with the Australia Telescope Compact Array. Comparing measured Faraday depth values of sources ‘on’ and ‘off’ the Bridge, we find that the two populations are implicitly different. Assuming that this difference in populations is due to a coherent field in the Magellanic Bridge, the observed Faraday depths indicate a median line-of-sight coherent magnetic-field strength of B∥ ≃ 0.3 μG directed uniformly away from us. Motivated by the varying magnitude of Faraday depths of sources on the Bridge, we speculate that the coherent field observed in the Bridge is a consequence of the coherent magnetic fields from the Large and Small Magellanic Clouds being pulled into the tidal feature. This is the first observation of a coherent magnetic field spanning the entirety of the Magellanic Bridge and we argue that this is a direct probe of a ‘pan-Magellanic’ fieldThe Australia Telescope is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. BMG and CRP acknowledge the support of the Australian Research Council through grant FL100100114. The Dunlap Institute is funded through an endowment established by the David Dunlap family and the University of Toronto. NMM-G acknowledges the support of the Australian Research Council through Future Fellowship FT150100024application/pdfen-AU© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society201710.1093/mnras/stx2062020-11-23