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Polarimetry of relativistic tidal disruption event Swift J2058+0516

Wiersema, K. and Higgins, A. B. and Levan, A. J. and Eyles, R. A. J. and Starling, R. L. C. and Tanvir, N. R. and Cenko, S. B. and van der Horst, A. J. and Gompertz, B. P. and Greiner, J. and Pasham, D. R. (2019) Polarimetry of relativistic tidal disruption event Swift J2058+0516. . (Unpublished)

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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 ~ 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.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Cenko, S. B.0000-0003-1673-970X
van der Horst, A. J.0000-0001-9149-6707
Additional Information:© 2018 The Authors. We thank the anonymous referee for their constructive comments that improved this paper. Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programme 288.B-5011(A), PI A. Levan. KW, AJL & NRT acknowledge that this project has received funding from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme (grant agreement no 725246). NRT, RLCS, ABH and RAJE thank the STFC for support. RLCS acknowledges support from Royal Society Research Grant RG170230. KW thanks S. Covino for insightful discussion.
Funding AgencyGrant Number
European Research Council (ERC)725246
Science and Technology Facilities Council (STFC)UNSPECIFIED
Royal SocietyRG170230
Subject Keywords:techniques: polarimetric – galaxies: jets
Record Number:CaltechAUTHORS:20191120-153829565
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99965
Deposited By: Tony Diaz
Deposited On:21 Nov 2019 03:43
Last Modified:21 Nov 2019 03:43

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