A small fraction of candidate tidal disruption events ( TDEs ) show evidence of powerful relativistic jets , which are particularly pronounced at radio wavelengths , and likely contribute non-thermal emission at a wide range of wavelengths .
A non-thermal emission component can be diagnosed using linear polarimetry , even when the total received light is dominated by emission from an accretion disk or disk outflow .
In this paper we present Very Large Telescope ( VLT ) measurements of the linear polarisation of the optical light of jetted TDE Swift J2058+0516 .
This is the second jetted TDE studied in this manner , after Swift J1644+57 .
We find evidence of non-zero optical linear polarisation , P _ { V } \sim 8 \% , a level very similar to the near-infrared polarimetry of Swift J1644+57 .
These detections provide an independent test of the emission mechanisms of the multiwavelength emission of jetted tidal disruption events .