Polarimetry of relativistic tidal disruption event Swift J2058+0516
2019
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
SwiftJ2058+0516. This is the second jetted TDE studied in this manner, after
SwiftJ1644+57. We find evidence of non-zero optical linear polarisation, P_V ~ 8%, a level very similar to the near-infrared
polarimetryof
SwiftJ1644+57. These detections provide an independent test of the emission mechanisms of the multiwavelength emission of jetted
tidal disruption events.
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