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A Model of Polarisation Rotations in Blazars from Kink Instabilities in Relativistic Jets

Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland
Academic Editors: Markus Boettcher, Emmanouil Angelakis and Jose L. Gómez
Galaxies 2017, 5(4), 64; https://doi.org/10.3390/galaxies5040064
Received: 15 September 2017 / Revised: 28 September 2017 / Accepted: 7 October 2017 / Published: 12 October 2017
(This article belongs to the Special Issue Polarised Emission from Astrophysical Jets)
This paper presents a simple model of polarisation rotation in optically thin relativistic jets of blazars. The model is based on the development of helical (kink) mode of current-driven instability. A possible explanation is suggested for the observational connection between polarisation rotations and optical/gamma-ray flares in blazars, if the current-driven modes are triggered by secular increases of the total jet power. The importance of intrinsic depolarisation in limiting the amplitude of coherent polarisation rotations is demonstrated. The polarisation rotation amplitude is thus very sensitive to the viewing angle, which appears to be inconsistent with the observational estimates of viewing angles in blazars showing polarisation rotations. Overall, there are serious obstacles to explaining large-amplitude polarisation rotations in blazars in terms of current-driven kink modes. View Full-Text
Keywords: blazars; relativistic jets; polarisation blazars; relativistic jets; polarisation
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MDPI and ACS Style

Nalewajko, K. A Model of Polarisation Rotations in Blazars from Kink Instabilities in Relativistic Jets. Galaxies 2017, 5, 64. https://doi.org/10.3390/galaxies5040064

AMA Style

Nalewajko K. A Model of Polarisation Rotations in Blazars from Kink Instabilities in Relativistic Jets. Galaxies. 2017; 5(4):64. https://doi.org/10.3390/galaxies5040064

Chicago/Turabian Style

Nalewajko, Krzysztof. 2017. "A Model of Polarisation Rotations in Blazars from Kink Instabilities in Relativistic Jets" Galaxies 5, no. 4: 64. https://doi.org/10.3390/galaxies5040064

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